Winding needle mechanism

Abstract

The utility model discloses a winding needle mechanism, which comprises a first winding needle, a second winding needle, a first winding needle seat and a second winding needle seat, the first winding needle comprises a first winding needle bottom plate and a first winding needle sheet sleeved on the first winding needle bottom plate, and the second winding needle comprises a second winding needle bottom plate and a second winding needle sheet sleeved on the second winding needle bottom plate; the second end of the first winding needle base plate is hinged to the first winding needle base, the first winding needle base plate and the first winding needle piece are arranged obliquely downwards relative to the first winding needle base, the second end of the second winding needle base plate is hinged to the second winding needle base, and the second winding needle base plate and the second winding needle piece are arranged obliquely upwards relative to the second winding needle base. One end of the first horizontal limiting seat is mounted at the top of the first winding needle seat, and the other end is connected with the top of the first winding needle bottom plate through a first elastic piece; one end of the second horizontal limiting seat is mounted at the top of the second winding needle seat, and the other end is connected with the top of the second winding needle bottom plate through a second elastic piece. According to the utility model, the blanking is convenient, and the qualified rate of battery cells is improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery winding, in particular to a winding needle mechanism of a lithium battery winding machine. Background Art

[0002] The winding needle mechanism of the existing lithium battery winding machine generally includes a first winding needle and a second winding needle. The first winding needle includes a first winding needle bottom plate and a first winding needle sheet sleeved on the first winding needle bottom plate. The second winding needle includes a second winding needle bottom plate and a second winding needle sheet sleeved on the second winding needle bottom plate. The first winding needle bottom plate and the second winding needle bottom plate, the first winding needle sheet and the second winding needle sheet are all arranged in a vertically opposite manner. The first winding needle bottom plate, the first winding needle sheet, the second winding needle bottom plate and the second winding needle sheet are all in a horizontal state. Usually, the first winding needle can be moved up and down as a whole, while the second winding needle is fixed as a whole. When the winding needle mechanism is removing the needle and unloading the material, the first winding needle moves downward as a whole, so that there is a gap between the outer peripheral surface of the first winding needle sheet of the first winding needle and the inner side surface of the battery cell. Since the second winding needle is fixed, the outer peripheral surface of the second winding needle sheet of the second winding needle is still attached to the inner side surface of the battery cell, which makes unloading more difficult and easily causes the phenomenon of battery cell pulling, thereby reducing the qualified rate of the battery cell. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a needle rolling mechanism, which is convenient for material feeding, can reduce the risk of core pulling of battery cells, and improve the qualified rate of battery cells.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A needle winding mechanism comprises a first needle winding, a second needle winding, a first needle winding seat and a second needle winding seat, the first needle winding comprises a first needle winding base plate and a first needle winding piece sleeved on the first needle winding base plate, a first end of the first needle winding base plate forms a first positioning block, the second needle winding comprises a second needle winding base plate and a second needle winding piece sleeved on the second needle winding base plate, a first end of the second needle winding base plate forms a second positioning block, the first needle winding base plate and the second needle winding base plate, the first needle winding piece and the second needle winding piece, the first needle winding seat and the second needle winding seat are all arranged opposite to each other in an upper and lower direction; the second end of the first needle winding base plate is hinged to the first needle winding seat, the first needle winding base plate, the first needle winding seat and the second needle winding seat are hinged, and the first needle winding base plate, the first needle winding seat and the second needle winding seat are hinged. The needle winding piece is arranged downwardly at an angle relative to the first needle winding seat, and the second end of the second needle winding base plate is hinged to the second needle winding seat, and the second needle winding base plate and the second needle winding piece are arranged upwardly at an angle relative to the second needle winding seat; it also includes a first horizontal limit seat and a second horizontal limit seat; one end of the first horizontal limit seat is installed to the top of the first needle winding seat, and the other end is connected to the top of the first needle winding base plate through a first elastic member, and the first elastic member is in a compressed state; one end of the second horizontal limit seat is installed to the top of the second needle winding seat, and the other end is connected to the top of the second needle winding base plate through a second elastic member, and the second elastic member is in a compressed state.

[0006] As a preferred technical solution, a first mounting groove is formed at the second end portion of the first needle winding base plate, the first needle winding seat includes a first mounting portion and a first connecting portion formed to one end of the first mounting portion, the first connecting portion cooperates with the first mounting groove, and the second end of the first needle winding base plate is hinged to the first connecting portion; one end of the first horizontal limit seat is installed to the top of the first connecting portion.

[0007] As a preferred technical solution, a plurality of first locking holes and a plurality of second locking holes are respectively provided on the left and right sides of the second end of the first needle winding base plate, a first locking screw is threaded into the first locking hole, and a second locking screw is threaded into the second locking hole, and the first locking screw and the second locking screw are respectively used to press the left inner wall and the right inner wall of the first mounting groove to the first connecting part to lock the first needle winding base plate, so that the first needle winding base plate and the first needle winding sheet can be arranged at an angle downward relative to the first needle winding seat.

[0008] As a preferred technical solution, the top and bottom of the end of the first horizontal limit seat away from the first needle winding seat are respectively provided with a first mounting hole and a first through hole connected to the first mounting hole, a first adjusting screw is threaded in the first mounting hole, a first mounting position is provided on the top of the first needle winding base plate, the first elastic member is arranged in the first mounting position, one end of the first elastic member is arranged at the bottom of the first mounting position, and the other end extends out of the first mounting position and is accommodated in the first through hole, and a first top plate is provided, the end of the first adjusting screw is installed on the first top plate, and the first elastic member is squeezed by the first top plate, so that the first elastic member is in a compressed state.

[0009] As a preferred technical solution, a second mounting groove is formed at the second end portion of the second needle winding base plate, the second needle winding seat includes a second mounting portion and a second connecting portion formed to one end of the second mounting portion, the second connecting portion cooperates with the second mounting groove, and the second end of the second needle winding base plate is hinged to the second connecting portion; one end of the second horizontal limit seat is installed to the top of the second connecting portion.

[0010] As a preferred technical solution, a plurality of third locking holes and a plurality of fourth locking holes are respectively provided on the left and right sides of the second end of the second needle winding base plate, a third locking screw is threaded into the third locking hole, and a fourth locking screw is threaded into the fourth locking hole, and the third locking screw and the fourth locking screw are respectively used to press the left inner wall and the right inner wall of the second mounting groove to the second connecting part to lock the second needle winding base plate, so that the second needle winding base plate and the second needle winding piece can be arranged inclined upward relative to the second needle winding seat.

[0011] As a preferred technical solution, the top and bottom of the second horizontal limit seat at one end away from the second needle winding seat are respectively provided with a second mounting hole and a second through hole connected to the second mounting hole, a second adjusting screw is threaded in the second mounting hole, a second mounting position is provided on the top of the second needle winding base plate, the second elastic member is arranged in the second mounting position, one end of the second elastic member is arranged at the bottom of the second mounting position, and the other end extends out of the second mounting position and is accommodated in the second through hole, and a second top plate is provided, the end of the second adjusting screw is installed on the second top plate, and the second elastic member is squeezed by the second top plate, so that the second elastic member is in a compressed state.

[0012] As a preferred technical solution, the bottom of the first needle winding piece is provided with a first installation cavity extending along the length direction of the first needle winding piece, the first needle winding piece is connected to the first needle winding base plate through the first installation cavity, a partition is provided at the opening of the first installation cavity, and the bottom of the first needle winding base plate is installed on the partition.

[0013] As a preferred technical solution, a receiving cavity extending along the length direction of the first winding needle base plate is provided at the bottom of the first winding needle base plate, and a cylinder is provided in the receiving cavity. The connecting shaft of the cylinder extends from the through groove of the partition and is connected to a diaphragm pressure plate. The diaphragm pressure plate is located below the partition and corresponds to the second winding needle base plate. The diaphragm pressure plate is used to clamp the battery cell diaphragm.

[0014] As a preferred technical solution, the first needle winding base plate and the first needle winding sheet are tilted downward at an angle greater than 0 degree and less than or equal to 0.3 degree, and the second needle winding base plate and the second needle winding sheet are tilted upward at an angle greater than 0 degree and less than or equal to 0.3 degree.

[0015] The beneficial effect of the utility model is that when the needle winding mechanism of the utility model is removing the needle and cutting the material, the first needle winding base plate and the first needle winding sheet are in a tilted downward state, and the second needle winding base plate and the second needle winding sheet are in a tilted upward state, so that there is a gap between the outer peripheral surface of the first needle winding sheet and the second needle winding sheet and the inner side surface of the battery cell, which facilitates cutting, reduces the risk of battery cell pulling, ensures the qualified rate of the battery cell, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 This is a structural schematic diagram of a needle winding mechanism provided by an embodiment of the utility model at a first angle;

[0018] Figure 2 yes Figure 1 A schematic structural diagram of a second angle of the needle winding mechanism shown;

[0019] Figure 3 yes Figure 1 A schematic front view of the needle winding mechanism shown;

[0020] Figure 4 yes Figure 1 An exploded schematic diagram of the needle winding mechanism shown;

[0021] Figure 5 It is a structural schematic diagram of a positioning sleeve of a supporting mechanism of a lithium battery winding machine;

[0022] Figure 6 yes Figure 1 The front view schematic diagram of the needle winding mechanism after the first positioning block and the second positioning block are inserted into the positioning groove of the positioning sleeve. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0024] Please refer to Figures 1 to 4 A needle winding mechanism provided in one embodiment of the utility model includes a first needle winding 10, a second needle winding 30, a first needle winding seat 50, a second needle winding seat 60, a first horizontal limit seat 70 and a second horizontal limit seat 80.

[0025] The first needle winding 10 includes a first needle winding base plate 12 and an arc-shaped first needle winding piece 14 sleeved on the first needle winding base plate 12. A first positioning block 122 is formed at the first end of the first needle winding base plate 12, and a second end of the first needle winding base plate 12 is hinged to the first needle winding seat 50, so that the first needle winding base plate 12 can rotate in the vertical direction relative to the first needle winding seat 50, and the first needle winding piece 14 can rotate with it. The second needle winding 30 includes a second needle winding base plate 32 and an arc-shaped second needle winding piece 34 sleeved on the second needle winding base plate 32. A second positioning block 322 is formed at the first end of the second needle winding base plate 32, and a second end of the second needle winding base plate 32 is hinged to the second needle winding seat 60, so that the second needle winding base plate 32 can rotate in the vertical direction relative to the second needle winding seat 60, and the second needle winding piece 34 can rotate with it. The first needle winding base plate 12 and the second needle winding base plate 32 are arranged opposite to each other in upper and lower positions, the first needle winding sheet 14 and the second needle winding sheet 34 are arranged opposite to each other in upper and lower positions and a clamping space for clamping the battery cell diaphragm is formed therebetween, and the first needle winding seat 50 and the second needle winding seat 60 are arranged opposite to each other in upper and lower positions.

[0026] The first needle winding base plate 12 and the first needle winding piece 14 are arranged obliquely downward relative to the first needle winding seat 50, and the second needle winding base plate 32 and the second needle winding piece 34 are arranged obliquely upward relative to the second needle winding seat 60. Figures 1 to 3 As shown, one end of the first horizontal limit seat 70 is mounted on the top of the first needle winding seat 50, and the other end is connected to the top of the first needle winding base 12 through the first elastic member 124, and the first elastic member 124 is in a compressed state. One end of the second horizontal limit seat 80 is mounted on the top of the second needle winding seat 60, and the other end is connected to the top of the second needle winding base 32 through the second elastic member 324, and the second elastic member 324 is in a compressed state.

[0027] The first positioning block 122 and the second positioning block 322 are used to cooperate with the positioning sleeve 200 of the support mechanism of the lithium battery winding machine to support the winding needle mechanism through the support mechanism, so that the winding needle mechanism can realize the winding of the battery cell. Figure 5 As shown, specifically, one end of the positioning sleeve 200 close to the needle winding mechanism has an annular positioning groove 202, and the shapes of the first positioning block 122 and the second positioning block 322 are adapted to the shape of the positioning groove 202. The shapes of the first positioning block 122 and the second positioning block 322 are both arc-shaped, and the first positioning block 122 and the second positioning block 322 are inserted into the positioning groove 202, so as to achieve cooperation with the positioning sleeve 200. The first needle winding seat 50 and the second needle winding seat 60 are used to install connecting shafts such as splines 100a and 100b. The needle winding mechanism can be installed on the frame of the lithium battery winding machine through the splines 100a and 100b, and is connected to the driving device through the splines 100a and 100b, so that the needle winding mechanism can be driven to move forward and backward through the driving device to insert the first positioning block 122 and the second positioning block 322 into the positioning groove 202 of the positioning sleeve 200 to achieve the needle threading action, or pull the first positioning block 122 and the second positioning block 322 out of the positioning groove 202 of the positioning sleeve 200 to achieve the needle pulling action.

[0028] Through the above structure, when the battery core winding process is actually carried out, the needle threading action is first performed, and the winding needle mechanism will move forward under the drive of the driving device to insert the first positioning block 122 and the second positioning block 322 into the positioning groove 202 of the positioning sleeve 200, so as to cooperate with the positioning sleeve. Since the first winding needle bottom plate 12 is in a tilted downward state and the second winding needle bottom plate 32 is in a tilted upward state, during the process of inserting the first positioning block 122 and the second positioning block 322 into the positioning groove 202, when the positioning groove 202 is close to the positioning sleeve 200, 00 center and the horizontal limiting effect of the first horizontal limiting seat 70 and the second horizontal limiting seat 80, the first needle winding base plate 12 will drive the first needle winding piece 14 to rotate upward relative to the first needle winding seat 50 to a horizontal state, and the second needle winding base plate 32 will drive the second needle winding piece 34 to rotate downward relative to the second needle winding seat 60 to a horizontal state. At this time, the first needle winding base plate 12, the first needle winding piece 14, the second needle winding base plate 32, and the second needle winding piece 34 are all in a horizontal state, and the first elastic member 124 and the second elastic member 324 are further compressed. Figure 6As shown, the winding process of the battery cell can be carried out on the outer circumferential surface of the first needle winding piece 14 and the second needle winding piece 34. After the winding process of the battery cell is completed, the needle winding mechanism must first perform a needle pulling action. When performing the needle pulling action, the needle winding mechanism will move backward under the drive of the driving device to realize the pulling out of the first positioning block 122 and the second positioning block 322 from the positioning groove 202 of the positioning sleeve 200. In the process of pulling out the first positioning block 122 and the second positioning block 322 from the positioning groove 202, since there is no squeezing by the inner wall of the positioning groove 202 close to the center of the positioning sleeve 200, the first needle winding base plate 12 will drive the first needle winding piece 14 back to the initial position under the action of the first elastic member 124, and the second needle winding base plate 32 will drive the second needle winding piece 34 back to the initial position under the action of the second elastic member 324. At this time, the first needle winding base plate 12 and the first needle winding piece 14 return to the tilted downward state, and the second needle winding base plate 32 and the second needle winding piece 34 return to the tilted upward state, as shown in FIG. Figures 1 to 3 As shown, there will be a gap between the outer peripheral surface of the first needle winding piece 14 and the second needle winding piece 34 and the inner side surface of the battery cell. Due to the existence of the gap, it will be more convenient for the needle winding mechanism to move backward under the drive of the driving device to remove the needle and cut the material, thereby reducing the risk of battery cell pulling, ensuring the qualified rate of the battery cell and improving production efficiency.

[0029] The first elastic member 124 and the second elastic member 324 are preferably springs. The first winding base plate 12 and the first winding piece 14 are inclined downward at an angle greater than 0 degree and less than or equal to 0.3 degree, and the second winding base plate 32 and the second winding piece 34 are inclined upward at an angle greater than 0 degree and less than or equal to 0.3 degree.

[0030] like Figure 4 As shown, in this embodiment, a first mounting groove 126 is formed at the second end of the first needle winding base plate 12, and the first mounting groove 126 is rectangular. The first needle winding seat 50 includes a first mounting portion 52 and a first connecting portion 54 formed to one end of the first mounting portion 52, the shape of the first connecting portion 54 is adapted to the shape of the first mounting groove 126, the first connecting portion 54 cooperates with the first mounting groove 126, and the second end of the first needle winding base plate 12 is hinged to the first connecting portion 54.

[0031] Specifically, the first connecting portion 54 has a first through hole 542, and the left inner wall and the right inner wall of the first mounting groove 126 are respectively provided with two first through holes 1262. The first through hole 542 and the two first through holes 1262 are provided with a first hinge shaft 56, and bushings are respectively provided between the first hinge shaft 56 and the inner wall of the first through hole 542 and between the first hinge shaft 56 and the inner wall of the first through hole 1262, so that the first needle winding base plate 12 can rotate relative to the first needle winding seat 50. Two first washers 562 are respectively installed at the two ends of the first hinge shaft 56 by screws, and the two first washers 562 are respectively located on the left and right sides of the first needle winding base plate 12. The two first washers 562 play a blocking role on the first hinge shaft 56 to prevent the first hinge shaft 56 from sliding out. One end of the first horizontal limit seat 70 is installed to the top of the first connecting portion 54 by a fastener such as a screw.

[0032] A plurality of first locking holes 123a and a plurality of second locking holes 123b are respectively provided on the left and right sides of the second end of the first needle winding base plate 12, a first locking screw (not shown in the figure) is threaded into the first locking hole 123a, and a second locking screw (not shown in the figure) is threaded into the second locking hole 123b, the first locking screw 123a and the second locking screw 123b are respectively used to press the left inner wall and the right inner wall of the first mounting groove 126 to the first connecting portion 54 to lock the first needle winding base plate 12, so that the first needle winding base plate 12 and the first needle winding piece 14 can be arranged downwardly at an angle relative to the first needle winding seat 50. When the needle winding mechanism performs the needle threading action, the squeezing force of the inner wall of the positioning groove 202 close to the center of the positioning sleeve 200 on the first positioning block 122 is configured to be greater than the locking force of the first needle winding base plate 12 by the first locking screw and the second locking screw, so that the first needle winding base plate 12 can be rotated upward to a horizontal state relative to the first needle winding seat 50. In actual assembly, the first needle winding base plate 12 is first adjusted according to the required downward tilt angle, and then the first locking screw and the second locking screw are installed in the first locking hole 123a and the second locking hole 123b to lock the first needle winding base plate 12.

[0033] Furthermore, a first locking nut and a second locking nut are sleeved on the top ends of the first locking screw 123a and the second locking screw 123b, so as to lock the first locking screw 123a and the second locking screw 123b respectively through the first locking nut and the second locking nut.

[0034] In this embodiment, the number of the first locking holes 123a and the second locking holes 123b on the left and right sides of the second end of the first winding needle base plate 12 are four, and correspondingly, the number of the first locking screws 123a and the second locking screws 123b are also four. It can be understood that the number of locking holes and locking screws can be set according to actual conditions.

[0035] The first horizontal limit seat 70 has a first mounting hole and a first through hole connected to the first mounting hole at the top and bottom of the end away from the first needle winding seat 50, respectively. A first adjusting screw 722 is screwed into the first mounting hole. The first mounting position 128 is provided at the top of the first needle winding base plate 12. The first elastic member 124 is set in the first mounting position 128. One end of the first elastic member 124 is set to the bottom of the first mounting position 128, and the other end extends from the first mounting position 128 and is accommodated in the first through hole. A first top plate 1244 is provided. The end of the first adjusting screw 722 is installed on the first top plate 1244, and the first elastic member 124 is squeezed by the first top plate 1244, so that the first elastic member 124 is in a compressed state. By screwing the first adjusting screw 722 downward or upward, the squeezing force on the first elastic member 124 can be changed, so that the downward tilt angle of the first needle winding base plate 12 and the first needle winding piece 14 can be adjusted, and the operation is convenient.

[0036] Furthermore, a first adjusting nut 724 is sleeved on the top end of the first adjusting screw 722 , and the first adjusting screw 722 can be locked by the first adjusting nut 724 .

[0037] In this embodiment, the number of the first elastic members 124 is two, and correspondingly, the number of the first mounting hole, the first through hole, the first adjusting screw 722, the first top plate 1244, and the first adjusting nut 724 are also two respectively. It can be understood that the number of the first elastic members 124, the first mounting hole, the first through hole, the first adjusting screw 722, the first top plate 1244, and the first adjusting nut 724 can be set according to actual conditions.

[0038] like Figure 4 As shown, in this embodiment, a second mounting groove 326 is formed at the second end of the second needle winding base plate 32, and the second mounting groove 326 is rectangular. The second needle winding seat 60 includes a second mounting portion 62 and a second connecting portion 64 formed to one end of the second mounting portion 62, the shape of the second connecting portion 64 is adapted to the shape of the second mounting groove 326, the second connecting portion 64 cooperates with the second mounting groove 326, and the second end of the second needle winding base plate 32 is hinged to the second connecting portion 64.

[0039] Specifically, the second connecting portion 64 is provided with a second through hole, and the second connecting portion 64 has a second through hole. The left inner wall and the right inner wall of the second mounting groove 326 are respectively provided with two second through holes. The second hinge shaft 66 is installed in the second through hole and the two second through holes. Bushings are respectively provided between the second hinge shaft 66 and the inner wall of the second through hole and between the second hinge shaft 66 and the inner wall of the second through hole, so that the second needle winding base plate 32 can rotate relative to the second needle winding seat 60. Two second gaskets 662 are respectively installed at the two ends of the second hinge shaft 66 by screws, and the two second gaskets 662 are respectively located on the left and right sides of the second needle winding base plate 32. The two second gaskets 662 play a blocking role on the second hinge shaft 66 to prevent the second hinge shaft 66 from sliding out. One end of the second horizontal limit seat 80 is installed to the top of the second connecting portion 64 by fasteners such as screws.

[0040] A plurality of third locking holes 323a and a plurality of fourth locking holes are respectively provided on the left and right sides of the second end of the second needle winding base plate 32. A third locking screw (not shown in the figure) is screwed into the third locking hole 323a, and a fourth locking screw (not shown in the figure) is screwed into the fourth locking hole. The third locking screw and the fourth locking screw are respectively used to press the left inner wall and the right inner wall of the second mounting groove 326 to the second connecting portion 64, so as to lock the second needle winding base plate 32, so that the second needle winding base plate 32 and the second needle winding piece 34 can be arranged upwardly and tilted relative to the second needle winding seat 60. When the needle winding mechanism performs the needle threading action, the squeezing force of the inner wall of the side of the positioning groove 202 close to the center of the positioning sleeve 200 on the second positioning block 322 is configured to be greater than the locking force of the second needle winding base plate 32 by the third locking screw and the fourth locking screw, so that the second needle winding base plate 32 can be rotated downward to a horizontal state relative to the second needle winding seat 60. During actual assembly, first adjust the second needle winding base plate 32 according to the required upward tilt angle, and then install the third locking screw and the fourth locking screw in the third locking hole 323a and the fourth locking hole to lock the second needle winding base plate 32.

[0041] Furthermore, a third locking nut and a fourth locking nut are sleeved on the top ends of the third locking screw 323a and the fourth locking screw, so that the third locking screw 323a and the fourth locking screw are locked by the third locking nut and the fourth locking nut respectively.

[0042] In this embodiment, the number of the third locking holes 323a and the fourth locking holes on the left and right sides of the second end of the second winding needle base plate 32 are four, and correspondingly, the number of the third locking screws and the fourth locking screws are also four. It can be understood that the number of locking holes and locking screws can be set according to actual conditions.

[0043] The second horizontal limit seat 80 has a second mounting hole and a second through hole connected to the second mounting hole at the top and bottom of the end away from the second needle winding seat 60, respectively. A second adjusting screw 822 is installed in the second mounting hole. The second mounting position is provided at the top of the second needle winding base plate 32. The second elastic member 324 is set in the second mounting position. One end of the second elastic member 324 is set to the bottom in the second mounting position, and the other end extends from the second mounting position and is accommodated in the second through hole. A second top plate is provided. The end of the second adjusting screw 822 is installed on the second top plate, and the second elastic member 324 is squeezed by the second top plate, so that the second elastic member 324 is in a compressed state. By screwing the second adjusting screw 822 downward or upward, the squeezing force on the second elastic member 324 can be changed, so that the upward tilt angle of the second needle winding base plate 32 and the second needle winding sheet 34 can be adjusted, and the operation is convenient.

[0044] A second adjusting nut 824 is sleeved on the top end of the second adjusting screw 822 , and the second adjusting screw 822 can be locked by the second adjusting nut 824 .

[0045] In this embodiment, the number of second elastic members 324 is two, and correspondingly, the number of second mounting holes, second through holes, second adjusting screws 822, second top plates, and second adjusting nuts 824 are also two respectively. It can be understood that the number of second elastic members 324, second mounting holes, second through holes, second adjusting screws 822, second top plates, and second adjusting nuts 824 can be set according to actual conditions.

[0046] The structure of the second top plate is the same as that of the first top plate 1244, and both are circular. The structure of the first needle holder 50 and the second needle holder 60 are the same.

[0047] Furthermore, if Figure 4 As shown, the bottom of the first needle winding piece 14 is provided with a first installation cavity 142 extending along the length direction of the first needle winding piece 14, and the first needle winding piece 14 is sleeved to the first needle winding base plate 12 through the first installation cavity 142. A partition plate 144 is provided at the opening of the first installation cavity 142, and the bottom of the first needle winding base plate 12 is mounted to the partition plate 144 by screws or the like. The bottom of the second needle winding piece 34 is provided with a second installation cavity extending along the length direction of the second needle winding piece 34, and the second needle winding piece 34 is sleeved to the second needle winding base plate 32 through the second installation cavity.

[0048] In this embodiment, the top of the first needle winding base plate 12 has a first recessed position extending along the length direction of the first needle winding base plate 12, and the first needle winding piece 14 is sleeved on the first recessed position. The top of the second needle winding base plate 32 has a second recessed position extending along the length direction of the second needle winding base plate 32, and the second needle winding piece 34 is sleeved on the second recessed position.

[0049] A receiving cavity extending along the length direction of the first winding needle base plate 12 is provided at the bottom of the first winding needle base plate 12, and a cylinder 92 is provided in the receiving cavity. The connecting shaft of the cylinder 92 extends from the through groove of the partition 144 and is connected to a diaphragm pressing plate 94. The diaphragm pressing plate 94 is located below the partition 144 and corresponds to the second winding needle base plate 32. The diaphragm pressing plate 94 can be driven up and down by the cylinder 92, and the diaphragm pressing plate 94 is used to clamp the battery cell diaphragm. In actual application, after the needle winding mechanism has completed the needle threading, the battery cell diaphragm is first placed in the clamping space between the first needle winding sheet 14 and the second needle winding sheet 34 to clamp the battery cell diaphragm, and then the diaphragm pressing plate 94 is driven downward by the cylinder 92 to clamp the battery cell diaphragm, and then the battery cell winding forming process is performed on the outer peripheral surface of the first needle winding sheet 14 and the second needle winding sheet 34. After the battery cell winding forming process is completed, the diaphragm pressing plate 94 is first driven back by the cylinder 92 to release the battery cell diaphragm, and then the needle pulling action is performed. By setting the diaphragm pressing plate 94 to clamp the battery cell diaphragm, compared with the existing method of clamping the battery cell diaphragm by tooth meshing, no obvious tooth marks will be left on the battery cell diaphragm, and the structure is simple, the space occupied is small, and the volume of the first needle winding base plate 12 can be reduced.

[0050] In this embodiment, the number of the cylinders 92 is two. It can be understood that the number of the cylinders 92 can be set according to actual conditions.

[0051] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A needle winding mechanism, comprising a first needle winding, a second needle winding, a first needle winding seat and a second needle winding seat, wherein the first needle winding comprises a first needle winding base plate and a first needle winding piece sleeved on the first needle winding base plate, a first end of the first needle winding base plate forms a first positioning block, the second needle winding comprises a second needle winding base plate and a second needle winding piece sleeved on the second needle winding base plate, a second end of the second needle winding base plate forms a second positioning block, the first needle winding base plate and the second needle winding base plate, the first needle winding piece and the second needle winding piece, the first needle winding seat and the second needle winding seat are all arranged opposite to each other in an upper and lower direction; characterized in that The second end of the first needle winding base plate is hinged to the first needle winding seat, the first needle winding base plate and the first needle winding piece are arranged obliquely downward relative to the first needle winding seat, the second end of the second needle winding base plate is hinged to the second needle winding seat, the second needle winding base plate and the second needle winding piece are arranged obliquely upward relative to the second needle winding seat; It also includes a first horizontal limit seat and a second horizontal limit seat; One end of the first horizontal limit seat is mounted on the top of the first needle winding seat, and the other end is connected to the top of the first needle winding bottom plate through a first elastic member, and the first elastic member is in a compressed state; One end of the second horizontal limit seat is installed on the top of the second needle winding seat, and the other end is connected to the top of the second needle winding base plate through a second elastic member, and the second elastic member is in a compressed state.

2. The needle winding mechanism according to claim 1, characterized in that: A first mounting groove is formed at the second end portion of the first needle winding base plate, and the first needle winding seat includes a first mounting portion and a first connecting portion formed to one end of the first mounting portion, the first connecting portion cooperates with the first mounting groove, and the second end of the first needle winding base plate is hinged to the first connecting portion; one end of the first horizontal limit seat is installed to the top of the first connecting portion.

3. The needle winding mechanism according to claim 2, characterized in that: A plurality of first locking holes and a plurality of second locking holes are respectively provided on the left and right sides of the second end of the first needle winding base plate, a first locking screw is threaded in the first locking hole, and a second locking screw is threaded in the second locking hole, the first locking screw and the second locking screw are respectively used to press the left inner wall and the right inner wall of the first mounting groove to the first connecting portion to lock the first needle winding base plate, so that the first needle winding base plate and the first needle winding sheet can be arranged tilted downward relative to the first needle winding seat.

4. The needle winding mechanism according to claim 1, characterized in that: The top and bottom of the first horizontal limit seat at one end away from the first needle winding seat are respectively provided with a first mounting hole and a first through hole connected to the first mounting hole, a first adjusting screw is screwed in the first mounting hole, a first mounting position is provided on the top of the first needle winding base plate, the first elastic member is set in the first mounting position, one end of the first elastic member is set to the bottom in the first mounting position, and the other end extends out of the first mounting position and is accommodated in the first through hole, and a first top plate is provided, the end of the first adjusting screw is installed on the first top plate, and the first elastic member is squeezed by the first top plate, so that the first elastic member is in a compressed state.

5. The needle winding mechanism according to claim 1, characterized in that: A second mounting groove is formed at the second end portion of the second needle winding base plate, and the second needle winding seat includes a second mounting portion and a second connecting portion formed to one end of the second mounting portion, the second connecting portion cooperates with the second mounting groove, and the second end of the second needle winding base plate is hinged to the second connecting portion; one end of the second horizontal limit seat is installed to the top of the second connecting portion.

6. The needle winding mechanism according to claim 5, characterized in that: A plurality of third locking holes and a plurality of fourth locking holes are respectively provided on the left and right sides of the second end of the second needle winding base plate, a third locking screw is threaded in the third locking hole, and a fourth locking screw is threaded in the fourth locking hole, the third locking screw and the fourth locking screw are respectively used to press the left inner wall and the right inner wall of the second mounting groove to the second connecting portion to lock the second needle winding base plate, so that the second needle winding base plate and the second needle winding sheet can be arranged upwardly and tilted relative to the second needle winding seat.

7. The needle winding mechanism according to claim 1, characterized in that: The top and bottom of the second horizontal limit seat at one end away from the second needle winding seat are respectively provided with a second mounting hole and a second through hole connected to the second mounting hole, a second adjusting screw is screwed in the second mounting hole, a second mounting position is provided on the top of the second needle winding base plate, the second elastic member is set in the second mounting position, one end of the second elastic member is set to the bottom in the second mounting position, and the other end extends out of the second mounting position and is accommodated in the second through hole, and a second top plate is provided, the end of the second adjusting screw is installed on the second top plate, and the second elastic member is squeezed by the second top plate, so that the second elastic member is in a compressed state.

8. The needle winding mechanism according to claim 1, characterized in that: A first mounting cavity extending along the length direction of the first needle winding piece is provided at the bottom of the first needle winding piece. The first needle winding piece is connected to the first needle winding base plate through the first mounting cavity. A partition is provided at the opening of the first mounting cavity. The bottom of the first needle winding base plate is installed on the partition.

9. The needle winding mechanism according to claim 8, characterized in that: A receiving cavity extending along the length direction of the first winding needle base plate is provided at the bottom of the first winding needle base plate, and a cylinder is provided in the receiving cavity. The connecting shaft of the cylinder extends out from the through groove of the partition and is connected to a diaphragm pressure plate. The diaphragm pressure plate is located below the partition and corresponds to the second winding needle base plate. The diaphragm pressure plate is used to clamp the battery cell diaphragm.

10. The needle winding mechanism according to claim 1, characterized in that: The first needle winding bottom plate and the first needle winding sheet are inclined downward at an angle greater than 0 degree and less than or equal to 0.3 degree, and the second needle winding bottom plate and the second needle winding sheet are inclined upward at an angle greater than 0 degree and less than or equal to 0.3 degree.

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