Reducing winding needle driven by sliding rod

Abstract

The utility model relates to a variable-diameter winding needle driven by a sliding rod, which comprises a needle core, a needle body and a variable-diameter transmission component, and the needle body is sleeved on the outer side of the needle core through a mounting seat; the variable-diameter transmission assembly is arranged between the needle core and the mounting base and comprises a collision block, a transmission base, a front sliding rod and a rear sliding rod, the collision block is arranged close to a plug of the needle core, the transmission base is in transmission connection with the mounting base through an inclined guide groove, and the front sliding rod and the rear sliding rod are arranged on the two sides of the transmission base; the front sliding rod is fixedly arranged between the collision block and the transmission base, the needle core is provided with a connecting base on one side of the rear sliding rod, a reset spring is arranged between the rear sliding rod and the connecting base, the needle core is provided with a guide base, and the rear sliding rod and the front sliding rod move in the length direction of the needle core under the action of the reset spring and a locking nozzle of a winding station. And the transmission seat drives the mounting seat and the needle body to move relative to the needle core. The transmission structure is simplified, assembling and overhauling are convenient, and it is guaranteed that the transmission base can stably drive the installation base through limitation of the guide base.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery winding technology, and in particular to a variable diameter winding needle with slide bar drive. Background Technology

[0002] During the winding process of lithium battery cells, the positive and negative electrode sheets need to be wound together with the separator on the winding needle to form a cell of a certain thickness. The quality of winding can be reflected in the alignment of the tabs of the positive and negative electrode sheets. Due to the thickness of the electrode sheets and the cumulative error in the laser cutting process of the electrode sheets and tabs, the alignment of the tabs may not meet the quality requirements of the cell. The problem can be solved well by using a variable diameter winding needle, so that the alignment of the tabs of the wound cell can meet the requirements.

[0003] Existing variable diameter needle winding structures are relatively complex. For example, the variable diameter needle winding mechanism and device disclosed in Chinese invention patent application number 202310573275.3 drive two outer needles respectively through the first and second adjusting members symmetrical on both sides of the inner needle to change the winding diameter of the needle. The entire structure requires many parts and is relatively complex to assemble. Moreover, the synchronization of the two outer needles is different, which affects the winding diameter control accuracy of the needle and is not conducive to improving the quality of the battery cell. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a variable diameter coiling needle with slide bar transmission.

[0005] This utility model provides a variable diameter coiled needle with a slide bar drive, including a needle core, a needle body, and a variable diameter drive assembly. The needle body is sleeved on the outside of the needle core via a mounting seat. The variable diameter drive assembly is disposed between the needle core and the mounting seat. The variable diameter drive assembly includes a collision block, a drive seat, a front slide bar, and a rear slide bar. The collision block is disposed near the plug of the needle core. The drive seat is connected to the mounting seat via an inclined guide groove. The front slide bar and the rear slide bar are disposed on both sides of the drive seat along the length direction of the needle core. The front slide bar is fixedly disposed between the collision block and the drive seat. The needle core has a connecting seat on one side of the rear slide bar. A return spring is disposed between the rear slide bar and the connecting seat. The needle core is provided with guide seats that slide in contact with the front slide bar and the rear slide bar respectively. The rear slide bar and the front slide bar move along the length direction of the needle core under the action of the return spring and the locking mouth of the winding station, and drive the mounting seat and the needle body to move relative to the needle core through the drive seat.

[0006] In some embodiments, the needle core has a transmission area in the middle, the transmission area has a clearance groove, the guide block of the transmission seat is disposed in the clearance groove, the portion of the guide block that extends above the transmission area extends into the transmission groove of the mounting seat, the mounting seat has a transmission shaft disposed in the transmission groove, the transmission shaft is movably disposed in the guide groove and is disposed perpendicular to the guide block.

[0007] In some embodiments, the mounting base has a protrusion protruding toward the needle core, and the drive shaft is mounted on the protrusion.

[0008] In some embodiments, the mounting base is divided into a first mounting base and a second mounting base, which are symmetrically arranged on both sides of the needle core and fixedly connected to a needle body respectively. The length of the first mounting base is less than the length of the second mounting base.

[0009] In some embodiments, the needle core is provided with a connecting part on the outside of the transmission area. The connecting part is provided with a first mounting hole and a second mounting hole. The first mounting hole is provided with a positioning pin. The positioning pin is fixedly connected to the mounting base. A compression spring is sleeved on the positioning pin. The compression spring acts between the needle core and the mounting base. A guide sleeve is fixed in the second mounting hole. A guide post passes through the guide sleeve. The guide post is fixedly connected to the mounting base.

[0010] In some embodiments, the transmission block of the transmission seat is provided with a first fixing block and a second fixing block on both sides, the first fixing block is fixedly connected to two front slide rods, the second fixing block is fixedly connected to two rear slide rods, the guide seat is divided into a first guide seat, a second guide seat and a third guide seat, the first guide seat and the second guide seat are slidably connected to the front slide rods, the third guide seat is slidably connected to the rear slide rods, and the transmission block moves between the second guide seat and the third guide seat.

[0011] In some embodiments, the first guide seat, the second guide seat, and the third guide seat are all provided with linear bearings.

[0012] In some embodiments, a pin is provided at one end of the rear slide rod near the connecting seat, and the connecting seat is correspondingly provided with a socket. The pin extends into the socket, and the return spring is sleeved on the pin and acts on the connecting seat.

[0013] In some embodiments, a top block is provided near the pin on the rear slide bar, and the end face of the return spring contacts the top block.

[0014] In some embodiments, the transmission base includes a transmission block, a guide block, and a connecting block. The transmission block is located outside the needle core, the guide block is disposed between the needle core and the mounting base, and the guide block is fixedly connected to the transmission block through the connecting block.

[0015] Compared with the prior art, the beneficial effects of this utility model are: the collision block and the locking mouth cooperate to push the front slide bar, the transmission seat and the rear slide bar to move together along the length direction of the needle core. The transmission seat drives the mounting seat and the needle body to move radially relative to the needle core through the guide groove. The transmission is carried out through the front slide bar and the rear slide bar, which simplifies the transmission structure and facilitates assembly and maintenance. The restriction of the guide seat makes the front slide bar and the rear slide bar move stably, ensuring that the transmission seat can stably drive the mounting seat. Attached Figure Description

[0016] Figure 1 This is one of the three-dimensional structural schematic diagrams of the needle core and the variable diameter transmission assembly according to an embodiment of this application.

[0017] Figure 2 This is the second three-dimensional structural schematic diagram of the needle core and variable diameter transmission assembly according to an embodiment of this application.

[0018] Figure 3 This is a schematic axial view of the needle core and variable diameter transmission assembly according to an embodiment of this application.

[0019] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure of AA'.

[0020] Figure 5 This is one of the side view structural schematic diagrams of the needle core and variable diameter transmission assembly according to an embodiment of this application.

[0021] Figure 6 This is the second side view of the needle core and variable diameter transmission assembly according to an embodiment of this application.

[0022] Figure 7 This is a three-dimensional structural diagram of the variable diameter winding needle with slide bar transmission according to an embodiment of this application.

[0023] Figure label:

[0024] 1. Needle core; 11. Plug; 12. Connector; 13. Socket; 14. Transmission area; 15. Recessed groove; 16. Connecting part; 17. First mounting hole; 18. Second mounting hole;

[0025] 2. Needle body;

[0026] 3. Variable diameter transmission assembly;

[0027] 4. Collision blocks;

[0028] 5. Transmission base; 51. Transmission block; 52. Guide block; 53. Connecting block; 54. First fixing block; 55. Second fixing block; 56. Guide groove;

[0029] 6. Front slide bar;

[0030] 7. Rear slide bar; 71. Return spring; 72. Pin; 73. Top block;

[0031] 8. Mounting base; 81. First mounting base; 82. Second mounting base; 83. Transmission groove; 84. Transmission shaft; 85. Protrusion; 86. Guide post; 87. Guide sleeve; 88. Locating pin; 89. Compression spring;

[0032] 9. Guide seat; 91. First guide seat; 92. Second guide seat; 93. Third guide seat; 94. Linear bearing. Detailed Implementation

[0033] The specific embodiments of this utility model are described with reference to the accompanying drawings.

[0034] refer to Figure 1 The figure shows a three-dimensional structural diagram of the needle core 1 and the variable diameter transmission assembly 3. The needle core 1 is connected to two needle bodies 2 through two mounting seats 8 respectively. The variable diameter transmission assembly 3 is set on one side of the needle core 1. The variable diameter transmission assembly 3 simultaneously drives the two mounting seats 8 and the needle bodies 2 to move radially relative to the needle core 1.

[0035] refer to Figures 1 to 7 A variable diameter coiled needle with slide bar drive includes a needle core 1, a needle body 2, and a variable diameter drive assembly 3. The needle body 2 is sleeved on the outside of the needle core 1 via a mounting base 8. The variable diameter drive assembly 3 is disposed between the needle core 1 and the mounting base 8. The variable diameter drive assembly 3 includes a collision block 4, a drive seat 5, a front slide bar 6, and a rear slide bar 7. The collision block 4 is disposed near the plug 11 of the needle core 1. The drive seat 5 is connected to the mounting base 8 via an inclined guide groove 56. The front slide bar 6 and the rear slide bar 7 are disposed along the length direction of the needle core 1 on the drive seat. On both sides of 5, the front slide rod 6 is fixedly set between the collision block 4 and the transmission seat 5. The needle core 1 is provided with a connecting seat 12 on one side of the rear slide rod 7. A return spring 71 is provided between the rear slide rod 7 and the connecting seat 12. The needle core 1 is provided with a guide seat 9 that slides in contact with the front slide rod 6 and the rear slide rod 7 respectively. The rear slide rod 7 and the front slide rod 6 move along the length direction of the needle core 1 under the action of the return spring 71 and the locking mouth of the winding station (not shown in the attached figure), and drive the mounting seat 8 and the needle body 2 to move relative to the needle core 1 through the transmission seat 5.

[0036] The variable diameter winding needle with slide bar drive of this application has a collision block 4 that works with the locking nozzle to push the front slide bar 6, the transmission seat 5 and the rear slide bar 7 together to move along the length direction of the needle core 1. The transmission seat 5 drives the mounting seat 8 and the needle body 2 to move radially relative to the needle core 1 through the guide groove 56. The transmission is carried out through the front slide bar 6 and the rear slide bar 7, which simplifies the transmission structure and facilitates assembly and maintenance. The guide seat 9 restricts the movement of the front slide bar 6 and the rear slide bar 7, ensuring that the transmission seat 5 can stably drive the mounting seat 8.

[0037] In order to enable the transmission seat 5 to be connected to the mounting seat 8, in this embodiment, reference is made to... Figure 2 The needle core 1 has a transmission area 14 in the middle, and the transmission area 14 has a relief groove 15. The guide block 52 of the transmission seat 5 is disposed in the relief groove 15. The part of the guide block 52 that is higher than the transmission area 14 extends into the transmission groove 83 of the mounting seat 8. The mounting seat 8 has a transmission shaft 84 disposed in the transmission groove 83. The transmission shaft 84 is movably disposed in the guide groove 56 and is perpendicular to the guide block 52.

[0038] Understandably, with this configuration, the transmission seat 5 includes a transmission block 51, a guide block 52, and a connecting block 53. The guide block 52 is movably disposed in the clearance groove 15, and both ends of the guide block 52 extend into the transmission grooves 83 of the two mounting seats 8 respectively. The radially moving guide block 52 drives four transmission shafts 84 simultaneously through four guide grooves 56. The transmission shafts 84 move along the guide grooves 56, and the mounting seats 8 move radially under the limitation of the guide post 86 and the guide sleeve 87.

[0039] In order to install the drive shaft 84, in this embodiment, refer to Figure 2 and Figure 5 The mounting base 8 has a protrusion 85 protruding towards the needle core 1, and the drive shaft 84 is mounted on the protrusion 85.

[0040] Understandably, with this configuration, the mounting base 8 mounts the drive shaft 84 via the protrusion 85. The protrusion 85 enhances the connection with the drive shaft 84, ensuring that the drive shaft 84 is stably mounted on the mounting base 8, thus improving its service life. At the same time, it helps to optimize the structure of the mounting base 8 and the coiling needle.

[0041] In order to install the needle body 2, in this embodiment, refer to Figure 1 and Figure 7 The mounting base 8 is divided into a first mounting base 81 and a second mounting base 82. The first mounting base 81 and the second mounting base 82 are symmetrically arranged on both sides of the needle core 1 and are fixedly connected to a needle body 2 respectively. The length of the first mounting base 81 is less than the length of the second mounting base 82.

[0042] Understandably, with this configuration, the two needle bodies 2 are combined into a cylindrical shape, and the two needle bodies 2 are the same size. The two needle bodies 2 are mounted on the outside of the needle core 1 through the first mounting seat 81 and the second mounting seat 82. The first mounting seat 81 and the second mounting seat 82 are located on both sides of the needle core 1, respectively. The shorter second mounting seat 82 will not interfere with the guide post 86 of the first mounting seat 81, making it convenient to adjust the position between the first mounting seat 81 and the second mounting seat 82. At the same time, the shorter second mounting seat 82 can reduce the weight of the coiled needle and reduce the self-load of the coiled needle.

[0043] In order to guide the mounting base 8 to move radially, in this embodiment, reference is made to... Figure 3 and Figure 4The needle core 1 is provided with a connecting part 16 on the outside of the transmission area 14. The connecting part 16 is provided with a first mounting hole 17 and a second mounting hole 18. The first mounting hole 17 is provided with a positioning pin 88, which is fixedly connected to the mounting base 8. A compression spring 89 is sleeved on the positioning pin 88, and the compression spring 89 acts between the needle core 1 and the mounting base 8. A guide sleeve 87 is fixed in the second mounting hole 18, and a guide post 86 passes through the guide sleeve 87. The guide post 86 is fixedly connected to the mounting base 8.

[0044] Understandably, with this configuration, the guide sleeve 87 and the guide post 86 are slidably connected, and both the guide sleeve 87 and the guide post 86 are arranged radially. The guide block 52 drives the transmission shaft 84 through the guide groove 56, thereby causing the mounting seat 8 to move along the guide post 86 and the guide sleeve 87. The positioning pin 88 and the compression spring 89 are arranged radially. When reset is required, the reset spring 71 pushes the transmission seat 5 to move along the length direction of the needle core 1, and the compression spring 89 pushes the mounting seat 8 to move radially, thereby quickly resetting the mounting seat 8 and avoiding jamming.

[0045] In order to install the front slide bar 6 and the rear slide bar 7, in this embodiment, refer to Figure 1 The transmission block 51 of the transmission seat 5 is provided with a first fixed block 54 and a second fixed block 55 on both sides. The first fixed block 54 is fixedly connected to the two front slide rods 6, and the second fixed block 55 is fixedly connected to the two rear slide rods 7. The guide seat 9 is divided into a first guide seat 91, a second guide seat 92 and a third guide seat 93. The first guide seat 91 and the second guide seat 92 are slidably connected to the front slide rods 6, and the third guide seat 93 is slidably connected to the rear slide rods 7. The transmission block 51 moves between the second guide seat 92 and the third guide seat 93.

[0046] Understandably, this configuration is designed to improve the stability of the transmission seat 5 during movement. The transmission block 51 is equipped with two front slide rods 6 via the first fixing block 54 and two rear slide rods 7 via the second fixing block 55. The first guide seat 91 and the second guide seat 92 restrict the two front slide rods 6 to move only along the length of the needle core 1, and the third moving seat restricts the two rear slide rods 7 to move only along the length of the needle core 1. This ensures that the transmission seat 5 can only move along the length of the needle core 1 and avoids wobbling during movement. The first fixing block 54 is positioned close to the first guide seat 91. Under the elastic force of the return spring 71, the rear slide rods 7, the transmission seat 5, and the front slide rods 6 will all move towards the locking nozzle. The first guide seat 91 will prevent the first fixing block 54 from moving further towards the locking nozzle, thus limiting the first fixing block 54 and ensuring that the transmission seat 5 always moves to the initial position during each reset.

[0047] To stably guide the movement of the front slide bar 6 and the rear slide bar 7, in this embodiment, reference is made to... Figure 1 The first guide seat 91, the second guide seat 92, and the third guide seat 93 are all equipped with linear bearings 94.

[0048] Understandably, with this configuration, the front slide bar 6 and the rear slide bar 7 are inserted into the corresponding linear bearings 94 and are slidably connected to the linear bearings 94, so that the front slide bar 6 and the rear slide bar 7 can slide stably.

[0049] In order to install the return spring 71, in this embodiment, refer to Figure 1 A pin 72 is provided at one end of the rear slide bar 7 near the connecting seat 12. The connecting seat 12 is provided with a corresponding insertion hole 13. The pin 72 extends into the insertion hole 13. The return spring 71 is sleeved on the pin 72 and acts on the connecting seat 12.

[0050] Understandably, with this configuration, the rear slide bar 7 cooperates with the connecting seat 12 through the pin 72, and the return spring 71 is sleeved on the pin 72. The radially moving rear slide bar 7 will drive the pin 72 to move back and forth at the insertion hole 13, thereby causing the return spring 71 to extend and retract.

[0051] To ensure that the return spring 71 is stably fitted onto the pin 72, in this embodiment, reference is made to... Figure 1 A top block 73 is provided near the pin 72 on the rear slide bar 7, and the end face of the return spring 71 contacts the top block 73.

[0052] Understandably, with this configuration, the outer diameter of the top block 73 is basically the same as the outer diameter of the return spring 71. The return spring 71 is sleeved on the pin 72, and the end face of the return spring 71 can contact the top block 73, so that the return spring 71 is stably sleeved on the pin 72.

[0053] To better drive the mounting base 8, in this embodiment, refer to Figure 6 The transmission base 5 includes a transmission block 51, a guide block 52 and a connecting block 53. The transmission block 51 is located outside the needle core 1, and the guide block 52 is disposed between the needle core 1 and the mounting base 8. The guide block 52 is fixedly connected to the transmission block 51 through the connecting block 53.

[0054] Understandably, with this configuration, the transmission block 51 is located outside the needle core 1 and is connected to the front slide bar 6 and the rear slide bar 7. The guide block 52 is located between the needle core 1 and the mounting base 8. The transmission block 51 is fixed to the guide block 52 through the connecting block 53, thereby adapting the transmission block 51 and the guide block 52 together. The torque generated by the collision block 4 contacting the locking nozzle is transmitted to the mounting base 8 through the front slide bar 6, transmission block 51, connecting block 53, guide block 52, guide groove 56, and transmission shaft 84.

[0055] In the working process of this embodiment, when the needle is inserted at the winding station, the coiled needle extends towards the locking nozzle, and the plug 11 of the needle core 1 is inserted into the locking nozzle, so that both ends of the coiled needle are supported; the coiled needle extends further, so that the locking nozzle contacts the collision block 4, and the locking nozzle pushes the transmission seat 5 and the rear slide rod 7 through the front slide rod 6. The return spring 71 on the rear slide rod 7 is compressed, and the guide block 52 drives the transmission shaft 84 to move through the guide groove 56. Under the restriction of the guide rod and the guide sleeve 87, the mounting seat 8 and the needle body 2 move away from the needle core 1. When the designated position is reached, the coiled needle stops moving. The diameter of the winding needle is determined, thereby determining the inner circumference of the winding needle. This designated position is calculated based on the deviation of the electrode tab position measured during electrode feeding, thereby compensating for the cumulative error of the electrode tab during the laser cutting process. After the battery cell is wound, the winding needle performs a needle withdrawal action, the winding needle retracts relative to the locking nozzle, the locking nozzle disengages from the collision block 4, the reset spring 71 pushes the rear slide rod 7, the transmission seat 5 and the front slide rod 6 to reset, and the compression spring 89 pushes the mounting seat 8 and the needle body 2 to reset to the initial position, so that the needle body 2 moves closer to the needle core 1, making the circumference of the winding needle smaller, which facilitates the feeding of the battery cell.

[0056] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A variable diameter needle coil driven by a slide bar, characterized in that, The device includes a needle core, a needle body, and a variable diameter transmission assembly. The needle body is sleeved on the outside of the needle core via a mounting seat. The variable diameter transmission assembly is disposed between the needle core and the mounting seat. The variable diameter transmission assembly includes a collision block, a transmission seat, a front slide rod, and a rear slide rod. The collision block is disposed near the plug of the needle core. The transmission seat is connected to the mounting seat via an inclined guide groove. The front slide rod and the rear slide rod are disposed on both sides of the transmission seat along the length direction of the needle core. The front slide rod is fixedly disposed between the collision block and the transmission seat. The needle core has a connecting seat on one side of the rear slide rod. A return spring is disposed between the rear slide rod and the connecting seat. The needle core is provided with guide seats that slide in contact with the front slide rod and the rear slide rod respectively. The rear slide rod and the front slide rod move along the length direction of the needle core under the action of the return spring and the locking mouth of the winding station, and drive the mounting seat and the needle body to move relative to the needle core through the transmission seat.

2. The variable diameter needle coil with slide bar drive according to claim 1, characterized in that, The needle core has a transmission area in the middle, and the transmission area has a clearance groove. The guide block of the transmission seat is disposed in the clearance groove. The part of the guide block that is higher than the transmission area extends into the transmission groove of the mounting seat. The mounting seat has a transmission shaft disposed in the transmission groove. The transmission shaft is movably disposed in the guide groove and is disposed perpendicular to the guide block.

3. The variable diameter needle coil with slide bar drive according to claim 2, characterized in that, The mounting base has a protrusion protruding towards the needle core, and the drive shaft is mounted on the protrusion.

4. The variable diameter coiled needle with slide bar transmission according to claim 2, characterized in that, The mounting base is divided into a first mounting base and a second mounting base. The first mounting base and the second mounting base are symmetrically arranged on both sides of the needle core and are fixedly connected to a needle body respectively. The length of the first mounting base is less than the length of the second mounting base.

5. The variable diameter needle coil with slide bar drive according to claim 2, characterized in that, The needle core has a connecting part on the outside of the transmission area. The connecting part has a first mounting hole and a second mounting hole. The first mounting hole has a positioning pin, which is fixedly connected to the mounting base. A compression spring is sleeved on the positioning pin, and the compression spring acts between the needle core and the mounting base. A guide sleeve is fixed in the second mounting hole, and a guide post passes through the guide sleeve. The guide post is fixedly connected to the mounting base.

6. The variable diameter needle coil with slide bar drive according to claim 1, characterized in that, The transmission block of the transmission seat is provided with a first fixed block and a second fixed block on both sides. The first fixed block is fixedly connected to two front slide rods, and the second fixed block is fixedly connected to two rear slide rods. The guide seat is divided into a first guide seat, a second guide seat and a third guide seat. The first guide seat and the second guide seat are slidably connected to the front slide rods, and the third guide seat is slidably connected to the rear slide rods. The transmission block moves between the second guide seat and the third guide seat.

7. The variable diameter needle coil with slide bar drive according to claim 6, characterized in that, The first guide seat, the second guide seat, and the third guide seat are all equipped with linear bearings.

8. The variable diameter needle coil with slide bar drive according to claim 1, characterized in that, The rear slide bar is provided with a pin at one end near the connecting seat, and the connecting seat is provided with a corresponding insertion hole. The pin extends into the insertion hole, and the return spring is sleeved on the pin and acts on the connecting seat.

9. The variable diameter needle coil with slide bar drive according to claim 8, characterized in that, A top block is provided near the pin on the rear slide bar, and the end face of the return spring contacts the top block.

10. The variable diameter needle coil with slide bar drive according to claim 1, characterized in that, The transmission base includes a transmission block, a guide block, and a connecting block. The transmission block is located outside the needle core, the guide block is disposed between the needle core and the mounting base, and the guide block is fixedly connected to the transmission block through the connecting block.

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