Tab pre-folding device

Abstract

The utility model belongs to the technical field of battery processing, and discloses a tab pre-folding device. According to the tab pre-folding device, a first cam driving mechanism comprises a first cam assembly and a first push rod assembly, the first cam assembly is in transmission connection with the first push rod assembly, and the first push rod assembly is arranged on a first mounting frame in a sliding mode and can abut against a positioning face of a tab in the sliding direction; the second mounting frame and the first mounting frame are arranged at an interval and form a material passing gap, and the material passing gap is used for allowing a material transferring jig for bearing the tab to pass through; the second cam driving mechanism comprises a second cam assembly and a second push rod assembly, the second cam assembly is in transmission connection with the second push rod assembly, the second push rod assembly is slidably arranged on the second mounting frame and can abut against the pre-folding surface of the tab in the sliding direction so that the pre-folding surface can be bent, and the pre-folding surface is oppositely arranged on the positioning surface; the driving piece is in transmission connection with the first cam assembly and the second cam assembly. The device is simple in structure and lower in use cost and size.

Description

Technical Field

[0001] The utility model relates to the technical field of battery processing, in particular to an ear pre-bending device. Background Art

[0002] The ear is an important component of a lithium-ion battery cell. The ear is a metal conductor that leads out the positive and negative electrodes from the cell. During the production process, the problem of dust and debris will occur in the ear flattening process. Therefore, currently, the process of pre-bending the ear in advance during the cell winding process and then flattening it is often adopted.

[0003] Traditional ear pre-bending mechanisms often use a large number of cylinders and motors for driving, making the mechanism complex in structure, large in size, and high in cost.

[0004] Based on the above, there is an urgent need for an ear pre-bending device to solve the problems existing in the prior art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an ear pre-bending device for solving the technical problems of the existing ear pre-bending mechanism, such as complex structure, large size, and high cost.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] An ear pre-bending device for bending an ear, the ear pre-bending device comprising:

[0008] A first mounting bracket;

[0009] A first cam driving mechanism, the first cam driving mechanism comprising a first cam assembly and a first push rod assembly, the first cam assembly being in transmission connection with the first push rod assembly, the first push rod assembly being slidably disposed on the first mounting bracket and being able to abut against the positioning surface of the ear along the sliding direction;

[0010] A second mounting bracket, spaced apart from the first mounting bracket and forming a material passing gap, the material passing gap being used to allow a transfer jig carrying the ear to pass through;

[0011] A second cam driving mechanism, the second cam driving mechanism comprising a second cam assembly and a second push rod assembly, the second cam assembly being in transmission connection with the second push rod assembly, the second push rod assembly being slidably disposed on the second mounting bracket and being able to press against the pre-bending surface of the ear along the sliding direction so as to bend the pre-bending surface, the pre-bending surface being oppositely disposed to the positioning surface;

[0012] A driving member, the driving member being in transmission connection with the first cam assembly and the second cam assembly.

[0013] Preferably, a first slide rail is provided on the first mounting bracket, a first slider is slidably arranged on the first slide rail, and the first push rod assembly is fixedly connected to the first slider;

[0014] A second slide rail is provided on the second mounting bracket, a second slider is slidably arranged on the second slide rail, and the second push rod assembly is fixedly connected to the second slider.

[0015] Preferably, the first push rod assembly includes a first push rod, a transmission seat and a push plate. One end of the first push rod is drivingly connected to the first cam assembly, the other end of the first push rod is fixedly connected to the first slider, the first slider is drivingly connected to the transmission seat, the transmission seat is slidably arranged on the first slide rail, and the transmission seat is fixedly connected to the push plate. The end of the push plate can abut against the positioning surface.

[0016] Preferably, a positioning groove is provided at the end of the push plate. The bottom of the positioning groove can abut against the positioning surface, and at the same time, the opposite two groove walls of the positioning groove can jointly limit and clamp the tab.

[0017] Preferably, the first push rod assembly further includes a first elastic member, and two ends of the first elastic member are respectively connected to the first slider and the transmission seat.

[0018] Preferably, a first sensor is arranged on the first mounting bracket. The first sensor is communicatively connected to the driving member. The first sensor is used to detect the actual moving distance of the push plate, and the driving member can control the start and stop of the first cam assembly according to the detection result of the first sensor.

[0019] Preferably, the second push rod assembly includes a second push rod, a top plate, a control assembly and a roller. One end of the second push rod is drivingly connected to the second cam assembly, the other end of the second push rod is fixedly connected to the second slider. The top plate and the control assembly are arranged on the second slider. The top plate can abut against the pre-fold surface along the sliding direction. The output end of the control assembly is connected to the roller. When the top plate abuts against the pre-fold surface, the control assembly can control the roller to move towards the direction close to the pre-fold surface, so that the roller can stick to and press on the pre-fold surface, so that the pre-fold surface is bent.

[0020] Preferably, the control assembly includes a base, a third slide rail, a third slider, an electric cylinder, and a fixing bracket. The base and the third slide rail are both fixedly connected to the second slider. The third slider is slidably disposed on the third slide rail. The electric cylinder is connected to the driving member, and the fixed end of the electric cylinder is fixedly connected to the third slider. The piston rod of the electric cylinder is limited to pass through the base, and the fixing bracket is fixedly connected to the fixed end of the electric cylinder, and the roller is rotatably connected to the fixing bracket.

[0021] Preferably, the control assembly further includes a second elastic member. The second elastic member is sleeved on the piston rod of the electric cylinder, and both ends of the second elastic member are respectively connected to the base and the fixed end of the electric cylinder.

[0022] Preferably, a second sensor is provided on the second mounting bracket. The second sensor is communicatively connected to the driving member. The second sensor is used to detect the actual moving distance of the top plate, and the driving member can control the start and stop of the second cam assembly according to the detection result of the second sensor.

[0023] The beneficial effects of the present utility model: This embodiment provides an ear pre-bending device. When in use, first, the driving member starts the first cam assembly, and controls the first push rod assembly to slide on the first mounting bracket through the first cam assembly, so that the end of the first push rod assembly can abut against the positioning surface of the ear, and the first push rod assembly can provide support and positioning functions for the bending process of the ear to prevent the ear from moving. Then, the driving member starts the second cam assembly, and controls the second push rod assembly to slide on the second mounting bracket through the second cam assembly, so that the end of the second push rod assembly can abut against the battery cap. At this time, the second push rod assembly continues to move, so that different degrees of bending can be generated on the pre-bending surface of the ear. The ear pre-bending device provided by this embodiment can use the first cam driving mechanism and the second cam driving mechanism to complete the bending of the ear. Compared with the operation of using a cylinder to complete the bending of the ear in the existing ear pre-bending device, the cam mechanism is simpler in structural composition, so the structure of the entire ear pre-bending device is simplified, and the use cost and volume are also smaller, thus effectively enhancing the applicability of the ear pre-bending device. Description of the Drawings

[0024] Figure 1 is a schematic structural diagram of the ear pre-bending device provided by the embodiment of the present utility model;

[0025] Figure 2 is a partial structural diagram of the battery with the ear to be bent in the embodiment of the present utility model;

[0026] Figure 3 is a partial structural diagram of the first mounting bracket provided by the embodiment of the present utility model;

[0027] Figure 4 It is a partial structural schematic diagram of the second mounting bracket provided by an embodiment of the present utility model;

[0028] Figure 5 It is a front view of the first mounting bracket provided by an embodiment of the present utility model;

[0029] Figure 6 It is Figure 3 a partial enlarged view of part A in

[0030] Figure 7 It is a rear view of the second mounting bracket provided by an embodiment of the present utility model;

[0031] Figure 8 It is Figure 4 a partial enlarged view of part B in

[0032] Figure 9 It is a structural schematic diagram of the control component provided by an embodiment of the present utility model.

[0033] In the figure:

[0034] 100, tab; 110, positioning surface; 120, pre-folded surface; 200, battery cap;

[0035] 1, first mounting bracket; 11, first slide rail; 12, first slider;

[0036] 2, first cam driving mechanism; 21, first push rod assembly; 211, first push rod; 212, transmission seat; 213, push plate; 2131, positioning groove; 214, first elastic member; 215, first sensor;

[0037] 3, second mounting bracket; 31, second slide rail; 32, second slider;

[0038] 4, second cam driving mechanism; 41, second push rod assembly; 411, second push rod; 412, top plate; 4121, card slot; 413, control component; 4131, base; 4132, third slide rail; 4133, third slider; 4134, electric cylinder; 4135, fixing bracket; 4136, second elastic member; 414, roller; 415, second sensor. Detailed implementation manners

[0039] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of convenience of description, only parts related to the present utility model are shown in the drawings, rather than all structures.

[0040] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0041] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0042] In the description of this embodiment, the orientation or positional relationship terms such as "above", "below", "right", and "left" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0043] The following will introduce the tab pre-bending device provided by the present utility model in conjunction with Figures 1 to 9 and specific embodiments. The tab pre-bending device provided by this embodiment is used to bend the tabs 100 on the battery cells in a battery, and this battery may be a cylindrical battery or a square battery, and this embodiment does not limit it.

[0044] Specifically, refer to Figures 1 to 3As shown, the tab pre-folding device includes a first mounting frame 1, a first cam driving mechanism 2, a second mounting frame 3, a second cam driving mechanism 4 and a driving member. The first mounting frame 1 and the second mounting frame 3 are arranged at intervals, and a material passing gap is formed between the two. The material transfer jig carrying the tab 100 can pass through the tab pre-folding device through the material gap. The first cam driving mechanism 2 includes a first cam assembly and a first push rod assembly 21. The first cam assembly is transmission-connected to the first push rod assembly 21. The first push rod assembly 21 is slidably arranged on the first mounting frame 1 and can abut against the positioning surface 110 of the tab 100 along the sliding direction. The second cam driving mechanism 4 includes a second cam assembly and a second push rod assembly 41, the second cam assembly is transmission-connected to the second push rod assembly 41, the second push rod assembly 41 is slidably disposed on the second mounting frame 3, and can press the pre-folding surface 120 of the tab 100 along the sliding direction to bend the pre-folding surface 120 of the tab 100, and the pre-folding surface 120 of the tab 100 is disposed relative to the positioning surface 110 of the tab 100. The driving member is transmission-connected to the first cam assembly and the second cam assembly.

[0045] It should be noted in advance that if Figure 2 As shown, in this embodiment, the battery further includes a battery cap 200 , which is connected to the pre-folding surface 120 of the battery, so that the tab pre-folding device can achieve the purpose of bending the tab 100 by rolling the battery cap 200 .

[0046] Exemplarily, when using the above-mentioned tab pre-folding device to bend the tab 100, the battery with the pre-folded tab 100 is first placed on a material transfer jig, and the material transfer jig transports the battery to the pre-folding station, that is, the material transfer gap between the first mounting seat and the second mounting frame 3, and then the driving member starts the first cam assembly, and the first cam assembly controls the first push rod assembly 21 to slide on the first mounting frame 1, so that the end of the first push rod assembly 21 can abut against the positioning surface 110 of the tab 100. In this way, the first push rod assembly 21 can provide support and positioning for the bending process of the tab 100 to prevent the tab 100 from moving. Then, the driving member starts the second cam assembly again, and controls the second push rod assembly 41 to slide on the second mounting frame 3 through the second cam assembly, so that the end of the second push rod assembly 41 can abut against the battery cap 200. At this time, the second push rod assembly 41 continues to move, so that the pre-folding surface 120 of the pole ear 100 can be bent to different degrees. The bending angle of the pole ear 100 is determined by actual needs, and this embodiment does not limit this.

[0047] It can be seen from this that the tab pre-bending device provided in this embodiment can use the first cam drive mechanism 2 and the second cam drive mechanism 4 to complete the bending of the tab 100. Compared with the operation of using a cylinder to complete the bending of the tab 100 in the existing tab pre-bending device, the cam mechanism is simpler in structural composition. Therefore, the structure of the entire tab pre-bending device is simplified, and the use cost and volume are also smaller, thereby effectively enhancing the applicability of the tab pre-bending device.

[0048] Specifically, in this embodiment, a first slide rail 11 is provided on the first mounting bracket 1, and a first slider 12 is slidably provided on the first slide rail 11. The first push rod assembly 21 is fixedly connected to the first slider 12. A second slide rail 31 is provided on the second mounting bracket 3, and a second slider 32 is slidably provided on the second slide rail 31. The second push rod assembly 41 is fixedly connected to the second slider 32. Through the guiding action of the above-mentioned first slide rail 11 and second slide rail 31, the first push rod assembly 21 and the second push rod assembly 41 maintain a stable direction during the movement, so as to ensure that the ends of the first push rod assembly 21 and the second push rod assembly 41 can respectively accurately abut against the positioning surface 110 of the tab 100 and the battery cap 200, avoiding the problem of reduced bending accuracy caused by poor docking.

[0049] Specifically, in this embodiment, referring to Figure 5 As shown, the first push rod assembly 21 includes a first push rod 211, a transmission seat 212, and a push plate 213. One end of the first push rod 211 is drivingly connected to the first cam assembly, and the other end of the first push rod 211 is fixedly connected to the first slider 12. The first slider 12 is drivingly connected to the transmission seat 212, and the transmission seat 212 is fixedly connected to the push plate 213. The transmission seat 212 is slidably provided on the first slide rail 11 to ensure the movement stability of the push plate 213. The end of the push plate 213 can abut against the positioning surface 110 of the tab 100, so as to achieve the effect of accurately positioning the tab 100 through the push plate 213. The above-mentioned first push rod assembly 21 not only has a simple structure and low cost, but also can use the push plate 213 with a simpler structure and smaller volume to position the tab 100, making the positioning effect of the first push rod assembly 21 on the tab 100 more accurate, and the technical difficulty and operation difficulty are also lower, so that the first push rod assembly 21 has been effectively improved in terms of functionality, economy and stability.

[0050] Furthermore, as Figure 6As shown, a positioning groove 2131 is provided at the end of the push plate 213. When the first slider 12 drives the transmission seat 212 and the push plate 213 to move along the direction close to the positioning surface 110 of the tab 100, the tab 100 can be inserted into the positioning groove 2131. The positioning surface 110 of the tab 100 abuts against the bottom of the positioning groove 2131, and both sides of the tab 100 are respectively attached and abutted against the groove walls of the positioning groove 2131, so as to jointly limit and clamp the tab 100 by the opposite two groove walls of the positioning groove 2131. In this way, the position of the tab 100 on the push plate 213 is more stable, avoiding any displacement or rotation of the tab 100, thus ensuring the operation accuracy of subsequent bending of the tab 100 and reducing the error.

[0051] For example, in this embodiment, the cross-sectional shape of the positioning groove 2131 is square to match the tab 100 whose cross-sectional shape is square on all four sides. Of course, in other embodiments, when the cross-sectional shape of the tab 100 is arc-shaped or semi-circular, the cross-sectional shape of the positioning groove 2131 is preferably also arc-shaped or semi-circular to obtain the best clamping effect and stability.

[0052] Furthermore, in this embodiment, the first push rod assembly 21 further includes a first elastic member 214. The first elastic member 214 is preferably a spring. The two ends of the spring are respectively fixedly connected to the first slider 12 and the transmission seat 212. When the transmission seat 212 drives the push plate 213 to move to the position where it abuts against the tab 100 and the first push rod 211 still drives the first slider 12 to move forward, the first elastic member 214 is compressed at this time to absorb the thrust applied by the first slider 12 on the transmission seat 212, so as to realize the buffering effect of the thrust of the first push rod 211 on the push plate 213 through the first elastic member 214, control the force of the push plate 213 pressing against the tab 100, so that the push plate 213 can maintain an appropriate pressure on the tab 100, avoid over-pressing and causing damage to the tab 100, and thus ensure the stable reliability during the use of the first push rod assembly 21.

[0053] More specifically, in this embodiment, a first sensor 215 is further provided on the first mounting bracket 1. By real-time detecting the actual moving distance of the push plate 213, the first sensor 215 can timely feedback the position state of the push plate 213 to the driving member, so as to ensure that the push plate 213 can automatically stop after reaching the set target position, further reducing the potential damage risk of the tab 100 caused by the over-movement of the push plate 213, and further ensuring the good contact between the push plate 213 and the tab 100 and the safety of the tab 100.

[0054] It should be noted that the type of the first sensor 215 is not limited in this embodiment. For example, sensor types such as laser displacement sensors, inductive sensors, and displacement sensors are all within the protection scope of this embodiment.

[0055] Specifically, in this embodiment, with reference to Figure 7 as shown, the second push rod assembly 41 includes a second push rod 411, a top plate 412, a control assembly 413 and a roller 414. One end of the second push rod 411 is drivingly connected to the second cam assembly, and the other end of the second push rod 411 is fixedly connected to the second slider 32. A top plate 412 and a control assembly 413 are arranged on the second slider 32. The top plate 412 can abut against the pre-folded surface 120 of the tab 100 along the sliding direction, and the output end of the control assembly 413 is connected to the roller 414.

[0056] Exemplarily, when the above-mentioned second push rod assembly 41 is specifically used, first, the second push rod 411 is used to drive the second slider 32 to move, and the second slider 32 simultaneously drives the control assembly 413, the top plate 412 and the roller 414 to move towards the pre-folded surface 120 of the tab 100. After the top plate 412 abuts against the pre-folded surface 120 of the tab 100, the second push rod 411 stops, so that the top plate 412 stops moving forward; the control assembly 413 is activated to drive the roller 414 to continue moving towards the pre-folded surface 120, so that the rolling surface of the roller 414 is attached to the pre-folded surface 120 of the tab 100 and at least part of the pre-folded surface 120 is rolled, causing the tab 100 to be bent and deformed.

[0057] In the above setting, through the combined clamping of the push block and the top plate 412, the tab 100 can maintain a stable posture during the bending deformation process, and will not be unnecessarily tilted and offset due to uneven force, enabling the roller 414 to better control the bending angle of the pre-folded surface 120 of the tab 100, effectively improving the accuracy and consistency of the tabs 100 produced in batches. In addition, the second push rod assembly 41 bends the tab 100 through the roller 414, with higher precision and greater stability. In this way, the above-mentioned second push rod assembly 41 can achieve the purpose of accurately obtaining the tab 100 with a preset bending angle with a small number of parts, and has low operation difficulty and a simple structure, reducing the production cost and occupied area.

[0058] Optionally, in this embodiment, a second sensor 415 is further arranged on the second mounting bracket 3. The second sensor 415 is used to detect the actual moving distance of the top plate 412 in real time and timely feedback the position state of the top plate 412 to the driving member, so as to ensure that after the top plate 412 reaches the set target position, the driving member can control the second cam assembly to stop, so as to control the top plate 412 to stop moving, thereby avoiding damage to the tab 100 caused by excessive movement of the top plate 412, and ensuring good contact between the top plate 412 and the tab 100 and the safety of the tab 100.

[0059] Of course, the present application also does not limit the type of the second sensor 415, and the type of the second sensor 415 can be a laser displacement sensor, an inductive sensor, a displacement sensor or other types of sensors.

[0060] Further, with reference to Figure 8 As shown, a clamping groove 4121 is formed at the end of the top plate 412. The cross-sectional shape of the clamping groove 4121 is the same as that of the positioning groove 2131, which is also square, so as to accurately limit and clamp the tab 100. In addition, it should be noted that the top plate 412 and the push plate 213 are arranged staggered in the vertical direction to ensure that the positioning groove 2131 and the clamping groove 4121 can effectively cooperate to clamp the tab 100 and avoid interference with each other.

[0061] Optionally, in this embodiment, the first push rod assembly 21 includes two push plates 213, the second push rod assembly 41 includes two top plates 412 and two rollers 414. The two push plates 213 are arranged corresponding to the two top plates 412. One of the push plates 213 and the corresponding top plate 412 are used to clamp one set of tabs 100 (one of the positive tab and the negative tab) on the battery, and the other push plate 213 and the corresponding top plate 412 are used to clamp the other set of tabs 100 (the other one of the positive tab and the negative tab) on the battery. The two rollers 414 are arranged corresponding to the two sets of tabs 100. Through the above arrangement, the tab pre-bending device can bend the two sets of tabs 100 on one battery at the same time, thereby effectively improving the processing efficiency.

[0062] Specifically, in this embodiment, with reference to Figure 9 As shown, the control assembly 413 includes a base 4131, a third slide rail 4132, a third slider 4133, an electric cylinder 4134 and a fixing bracket 4135. Among them, the base 4131 and the third slide rail 4132 are both fixedly connected to the second slider 32. The third slider 4133 is slidably arranged on the third slide rail 4132. The electric cylinder 4134 is connected to the driving member, and the fixed end of the electric cylinder 4134 is fixedly connected to the third slider 4133. The piston rod of the electric cylinder 4134 is limitedly penetrated through the base 4131. The fixing bracket 4135 is fixedly connected to the fixed end of the electric cylinder 4134, and the roller 414 is rotatably connected to the fixing bracket 4135.

[0063] Exemplarily, through the above settings, after the pushing block abuts against the pre-folded surface 120 of the tab 100, the driving member controls the second cam assembly to stop, so that the second cam assembly fixes the pushing block on the second slide rail 31 through the second push rod 411. At the same time, the driving member controls the electric cylinder 4134 to be opened. After the electric cylinder 4134 is opened, the piston rod of the electric cylinder 4134 extends. Due to the reaction force of the base 4131 on the piston rod, the fixed end of the electric cylinder 4134 can drive the third slider 4133, the fixing bracket 4135 and the roller 414 to move along the third slide rail 4132 in the direction close to the tab 100, so as to further ensure that the rolling surface of the roller 414 precisely fits on the pre-folded surface 120 of the tab 100. When the roller 414 bends the pre-folded surface 120 of the tab 100 to a preset angle, the driving member controls the electric cylinder 4134 to retract the piston rod, so that the roller 414 retracts.

[0064] In the above process, the electric cylinder 4134 can realize the precise movement of the roller 414 by accurately controlling the telescopic length of the piston rod. It is possible to prevent the tab 100 from being over-folded and pressed without adjusting the angular position of the tab 100 in advance, thereby effectively reducing the processing time and improving the efficiency. In addition, in this embodiment, the fixed end of the electric cylinder 4134 is directly connected to the fixing bracket 4135, and the fixed end of the electric cylinder 4134 can be stably arranged on the third slide rail 4132 through the third slider 4133, thereby reducing the influence of the vibration of the piston rod of the electric cylinder 4134 on the roller 414. Compared with the method of using the piston rod of the electric cylinder 4134 to push the roller 414 to move, it can effectively avoid the risk of unstable rolling of the roller 414 due to factors such as vibration during the bending process of the tab 100, so that the roller 414 can remain stable when rolling the tab 100.

[0065] Optionally, the control component 413 provided in this embodiment further includes a second elastic member 4136. The second elastic member 4136 is sleeved on the piston rod of the electric cylinder 4134, and both ends of the second elastic member 4136 are respectively connected to the base 4131 and the fixed end of the electric cylinder 4134. Preferably, the second elastic member 4136 is also a spring, which has low cost and high use stability. By clamping the second elastic member 4136 between the base 4131 and the fixed end of the electric cylinder 4134, when the third slider 4133 drives the fixed end of the electric cylinder 4134 to move away from the base 4131 (that is, in the direction close to the tab 100) and the roller 414 rolls on the tab 100, the second elastic member 4136 is in a gradually stretched state, and the elastic pre-tightening force of the second elastic member 4136 gradually increases. Therefore, the pulling force on the fixed end of the electric cylinder 4134 gradually increases, which indirectly can gradually reduce the forward movement speed of the roller 414. In this way, the force of the roller 414 rolling on the tab 100 can be controlled by the second elastic member 4136 to ensure that the bending result of the tab 100 can not only achieve the expected effect, but also will not cause unnecessary damage to the tab 100 due to excessive rolling force, thereby further improving the quality of the bending of the tab 100.

[0066] Preferably, in this embodiment, the driving member can be a motor, such as a servo motor, a stepper motor, etc. It has a fast response loudness and can meet the requirements of high-precision control of the bending of the tab 100 by the tab pre-bending device under actual working conditions.

[0067] In the description of this specification, the descriptions referring to the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0068] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A tab pre-folding device, used for bending a tab (100), characterized in that: The tab pre-folding device comprises: A first mounting frame (1); A first cam driving mechanism (2), the first cam driving mechanism (2) comprising a first cam assembly and a first push rod assembly (21), the first cam assembly being drivingly connected to the first push rod assembly (21), the first push rod assembly (21) being slidably disposed on the first mounting frame (1) and being capable of abutting against a positioning surface (110) of the pole lug (100) along a sliding direction; A second mounting frame (3) is spaced apart from the first mounting frame (1) to form a material passing gap, wherein the material passing gap is used to allow a material transfer jig carrying the tab (100) to pass through; a second cam driving mechanism (4), the second cam driving mechanism (4) comprising a second cam assembly and a second push rod assembly (41), the second cam assembly being drivingly connected to the second push rod assembly (41), the second push rod assembly (41) being slidably disposed on the second mounting frame (3), and being capable of pressing the pre-folding surface (120) of the pole ear (100) along a sliding direction so that the pre-folding surface (120) is bent, the pre-folding surface (120) being disposed relative to the positioning surface (110); A driving member is drivingly connected to the first cam assembly and the second cam assembly.

2. The tab pre-folding device according to claim 1, characterized in that: The first mounting frame (1) is provided with a first slide rail (11), a first slider (12) is slidably arranged on the first slide rail (11), and the first push rod assembly (21) is fixedly connected to the first slider (12); The second mounting frame (3) is provided with a second slide rail (31), a second slider (32) is slidably arranged on the second slide rail (31), and the second push rod assembly (41) is fixedly connected to the second slider (32).

3. The tab pre-folding device according to claim 2, characterized in that: The first push rod assembly (21) comprises a first push rod (211), a transmission seat (212) and a push plate (213), one end of the first push rod (211) is transmission-connected to the first cam assembly, the other end of the first push rod (211) is fixedly connected to the first slider (12), the first slider (12) is transmission-connected to the transmission seat (212), the transmission seat (212) is slidably disposed on the first slide rail (11), and the transmission seat (212) is fixedly connected to the push plate (213), and the end of the push plate (213) can abut against the positioning surface (110).

4. The tab pre-folding device according to claim 3, characterized in that: A positioning groove (2131) is provided at the end of the push plate (213), the bottom of the positioning groove (2131) can abut against the positioning surface (110), and the two opposite groove walls of the positioning groove (2131) can jointly limit and clamp the pole lug (100).

5. The tab pre-folding device according to claim 3, characterized in that: The first push rod assembly (21) further comprises a first elastic member (214), and two ends of the first elastic member (214) are respectively connected to the first sliding block (12) and the transmission seat (212).

6. The tab pre-folding device according to claim 3, characterized in that: A first sensor (215) is provided on the first mounting frame (1), and the first sensor (215) is communicatively connected to the driving member. The first sensor (215) is used to detect the actual moving distance of the push plate (213), and the driving member can control the start and stop of the first cam assembly according to the detection result of the first sensor (215).

7. The tab pre-folding device according to claim 2, characterized in that: The second push rod assembly (41) includes a second push rod (411), a top plate (412), a control assembly (413) and a roller (414). One end of the second push rod (411) is transmission-connected to the second cam assembly, and the other end of the second push rod (411) is fixedly connected to the second slider (32). The second slider (32) is provided with the top plate (412) and the control assembly (413). The top plate (412) can abut against the pre-folding surface (120) along the sliding direction. The output end of the control assembly (413) is connected to the roller (414). When the top plate (412) abuts against the pre-folding surface (120), the control assembly (413) can control the roller (414) to move in a direction close to the pre-folding surface (120), so that the roller (414) can stick to and apply pressure to the pre-folding surface (120), so that the pre-folding surface (120) is bent.

8. The tab pre-folding device according to claim 7, characterized in that: The control component (413) includes a base (4131), a third slide rail (4132), a third slider (4133), an electric cylinder (4134) and a fixed frame (4135); the base (4131) and the third slide rail (4132) are both fixedly connected to the second slider (32); the third slider (4133) is slidably arranged on the third slide rail (4132); the electric cylinder (4134) is connected to the driving member, and the fixed end of the electric cylinder (4134) is fixedly connected to the third slider (4133); the piston rod of the electric cylinder (4134) is limitedly arranged on the base (4131); the fixed frame (4135) is fixedly connected to the fixed end of the electric cylinder (4134); and the roller (414) is rotatably connected to the fixed frame (4135).

9. The tab pre-folding device according to claim 8, characterized in that: The control component (413) also includes a second elastic member (4136), which is sleeved on the piston rod of the electric cylinder (4134), and the two ends of the second elastic member (4136) are respectively connected to the base (4131) and the fixed end of the electric cylinder (4134).

10. The tab pre-folding device according to claim 7, characterized in that: The second mounting frame (3) is provided with a second sensor (415), the second sensor (415) is communicatively connected to the driving member, the second sensor (415) is used to detect the actual moving distance of the top plate (412), and the driving member can control the start and stop of the second cam assembly according to the detection result of the second sensor (415).

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