Solder strip traction mechanism and series welding machine

Abstract

The utility model discloses a welding strip traction mechanism and a series welding machine, and belongs to the technical field of photovoltaic cell string production equipment. In the welding strip traction mechanism, a sliding seat is arranged on a fixed seat and is driven by a driving assembly to slide back and forth on the fixed seat, and a containing cavity is formed in the side, facing the fixed seat, of the sliding seat; the first clamping jaw is provided with a fixed end and a first contact part extending towards the external space of the sliding seat, and the fixed end is fixedly connected with the sliding seat; the second clamping jaw is rotatably connected to the fixing seat and located on one side of the first clamping jaw, and the second clamping jaw is provided with a driven end extending into the containing cavity and a second contact part extending towards the outside of the fixing seat; when the sliding seat slides in a reciprocating mode, the containing cavity drives the driven end to move so that the second contact part can rotate towards the first contact part or rotate away from the first contact part, rotation of the second contact part is matched with reciprocating movement of the first contact part so that the first contact part and the second contact part can be switched between the opening state and the closing state, and therefore the welding strip can be clamped or loosened. Therefore, the welding strip is effectively prevented from rolling over when being clamped.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of photovoltaic cell string production equipment. Specifically, the present application relates to a welding ribbon traction mechanism and a string welding machine. Background Art

[0002] During the string welding operation of the battery cell and the welding ribbon, the welding ribbon needs to be pulled or tightened. The current welding ribbon pulling mechanism generally clamps the welding ribbon by moving two clamping jaws closer or farther from each other. The two clamping jaws are hinged and fixed respectively. By driving the two clamping jaws to swing in the opposite direction, the clamping ends of the two clamping jaws are moved closer or farther from each other (i.e., the switching of the open and closed states), thereby clamping and releasing the welding ribbon. When the welding ribbon is clamped in this way, the clamping force applied to the welding ribbon will cause the welding ribbon to rotate, causing the flattened part of the welding ribbon to flip to the side. When the flipped welding ribbon is stacked with the battery cell, the risk of hidden cracks in the battery cell will increase. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a welding ribbon pulling mechanism and a stringing machine to ensure that when the welding ribbon is clamped, the welding ribbon will not flip over and affect the quality of the battery cell stringing.

[0004] The solution of this application example is implemented through the following contents.

[0005] In a first aspect, an example of the present application provides a welding ribbon traction mechanism, the welding ribbon traction mechanism comprising a fixed seat, a sliding seat, a driving assembly, a first clamping jaw and a second clamping jaw, wherein:

[0006] The sliding seat is located on the fixed seat, and a receiving cavity is formed on one side of the sliding seat facing the fixed seat. The driving assembly drives the sliding seat to slide back and forth on the fixed seat;

[0007] The first clamping jaw has a fixed end and a first contact portion extending toward the outer space of the sliding seat, and the fixed end of the first clamping jaw is fixedly connected to the sliding seat;

[0008] The second clamping jaw is rotatably connected to the fixing seat and is located on one side of the first clamping jaw, and the second clamping jaw has a driven end extending into the accommodating cavity and a second contact portion extending toward the outer space of the fixing seat;

[0009] When the sliding seat slides back and forth, the accommodating cavity drives the driven end to move so that the second contact part rotates toward or away from the first contact part, and the rotation of the second contact part cooperates with the reciprocating movement of the first contact part to realize the switching of the first contact part and the second contact part between the open and closed states, so as to clamp or release the welding strip.

[0010] The present application drives the sliding seat to slide and drives the first clamping jaw to move horizontally so as to approach the second clamping jaw. Since the driven end of the second clamping jaw extends into the accommodating cavity, the second clamping jaw is driven by the accommodating cavity and can swing toward the first clamping jaw at the same time, thereby clamping the welding strip. This method effectively avoids the situation where the welding strip tipping over occurs when being clamped, thereby reducing the probability of hidden cracks during stringing.

[0011] According to some examples of the first aspect of the present application, the welding ribbon traction mechanism further includes an elastic component, a first end of the elastic component abuts against the driven end, and a second end of the elastic component abuts against the inner wall of the accommodating cavity.

[0012] The elastic component can buffer the clamping force of the first clamping jaw and the second clamping jaw, which helps to avoid clamping the welding strip.

[0013] According to some examples of the first aspect of the present application, a receiving groove is formed at the driven end, and the first end of the elastic component is disposed in the receiving groove.

[0014] The first end of the elastic component is arranged in the accommodating groove, thereby enhancing stability.

[0015] According to some examples of the first aspect of the present application, the side wall of the driven end facing away from the elastic component is constructed as an arc-shaped protrusion, and the arc-shaped protrusion abuts against the inner wall of the accommodating cavity.

[0016] The arc-shaped protrusion always abuts against the inner wall of the accommodating cavity, which helps to enhance the controllability of the rotation action of the second clamping jaw.

[0017] According to some examples of the first aspect of the present application, a rotating shaft is provided on the fixed seat, a middle portion of the second clamping jaw is installed on the rotating shaft, and the second clamping jaw can rotate around the rotating shaft in a plane where the first contact portion reciprocates.

[0018] The second clamping jaw can rotate around the rotating shaft through the rotating shaft installation, and the rotating axis is stable and reliable.

[0019] According to some examples of the first aspect of the present application, the sliding seat has a mounting plate and a boss, the boss and the first clamping jaw are installed on the same side of the mounting plate with an upper and lower interval and protrude from the mounting plate, and the boss, the fixed end of the first clamping jaw and the mounting plate form an inner concave space extending along the reciprocating sliding direction of the sliding seat, the fixed seat is located in the inner concave space, and the boss forms a accommodating cavity near the side wall of the fixed seat.

[0020] The formed concave space can also play a guiding and supporting role for the reciprocating sliding of the sliding seat, which helps to improve the stability of the reciprocating sliding action and prevent the sliding seat from deviating.

[0021] According to some examples of the first aspect of the present application, the welding strip traction mechanism also includes a base, on which are formed a connecting portion and a slide rail that do not interfere with each other, and an installation window is formed on the installation plate. The fixed seat is fixed to the connecting portion through the installation window, and the sliding seat is slidably set on the slide rail.

[0022] After the mounting plate is arranged on the slide rail, the fixing seat can be fixedly connected with the connecting part through the mounting window, and the mounting window provides space for the reciprocating sliding of the mounting plate on the slide rail to avoid interference with the connecting structure of the fixing seat and the connecting part.

[0023] According to some examples of the first aspect of the present application, the welding strip traction mechanism further includes a base, the sliding seat is slidably mounted on the base, and the driving assembly includes a first driving member, a first elastic reset member and a transmission swing arm, wherein:

[0024] One end of the first elastic reset member is connected to the base, and the other end is connected to the sliding seat. The first elastic reset member provides a force to reset the sliding seat, and the reset force separates the second contact portion from the first contact portion.

[0025] The middle part of the transmission swing arm is installed on the base through a rotating shaft. The transmission swing arm is constructed to rotate in a plane around the rotating shaft, and the first end of the transmission swing arm is rotationally connected to the driving end of the first driving member. The second end of the transmission swing arm provides a force to make the sliding seat slide, and the sliding force causes the second contact part to close with the first contact part.

[0026] The driving end of the first driving member drives the transmission swing arm to rotate, thereby driving the transmission swing arm to push the sliding seat to slide. When the driving end of the first driving member contracts and resets, the transmission swing arm resets (the direction in which the transmission swing arm resets is opposite to the direction in which the transmission swing arm pushes the sliding seat), and the sliding seat resets under the pull of the first elastic reset member (the direction in which the sliding seat resets is opposite to the direction in which it slides due to the push of the transmission swing arm), and the second clamp and the first clamp are also reset.

[0027] According to some examples of the first aspect of the present application, a rolling component is provided at the second end of the transmission swing arm, and the rolling component is used to push the sliding seat.

[0028] The action of the rolling elements on the sliding seat helps to reduce wear.

[0029] According to some examples of the first aspect of the present application, a stopper is provided on the sliding seat, and the rolling component acts on the stopper.

[0030] The stopper helps to increase the force-bearing surface and improve the stability of the thrust resistance.

[0031] According to some examples of the first aspect of the present application, the welding tape traction mechanism further includes a transmission block and a limiting positioning assembly, the transmission block is mounted on the driving end of the first driving member, and the middle portion of the transmission block is rotatably connected to the first end of the transmission swing arm;

[0032] A stop block is provided at one end of the transmission block close to the limiting positioning assembly, and the limiting positioning assembly is used to limit the stop block to a first position. When the stop block is in the first position, the first contact portion and the second contact portion are in a slightly open state between the opening and closing states, and the clamped object between the first contact portion and the second contact portion is disengaged due to its own weight.

[0033] By limiting the positioning component, the driving end of the first driving member can be limited to be stably in a specific position, so that the first contact portion and the second contact portion are in a slightly opened state between the open and closed states. The welding strip is released in the slightly opened state, and the horizontal movement space of the welding strip is small, which reduces the possibility of the welding strip being offset after being placed on the battery cell group, thereby greatly reducing the possibility of whitening of the battery string after stringing.

[0034] According to some examples of the first aspect of the present application, the limiting positioning assembly includes two limiting members, a second driving member, a second elastic reset member and a wedge block, wherein:

[0035] The two limiting members are arranged oppositely on both sides of the stop block and extend along the stroke direction of the stop block. One end of the two limiting members close to the first driving member is rotatably arranged on the base. A second elastic reset member that allows the two limiting members to approach each other is arranged between the other ends of the two limiting members. A clamping groove corresponding to the first position is formed on the inner side surfaces opposite to each other of the two limiting members. The clamping groove is used to clamp and position the stop block. The inner side surface of the limiting member extending from the clamping groove to the side close to the second driving member is formed with a slope surface. The distance between the slope surfaces of the two limiting members increases continuously from the clamping groove to the extension direction of the second driving member.

[0036] The driving end of the second driving member is connected to the wedge block, and the second driving member drives the wedge block to move toward the stop block. The wedge block pushes the slope surfaces of the two limiting members to rotate the two limiting members outward and separate, thereby releasing the restriction on the stop block.

[0037] By clamping the positioning stop block by the slots on the two limit members, the first contact portion and the second contact portion can be stably in a slightly open state, and under the tensioning action of the second elastic reset member and the cooperation of the ramp surface and the wedge block, the movement of the stop block (such as being restricted by the slot for positioning or being released) can be more controllable.

[0038] According to some examples of the first aspect of the present application, when the stop block is located in the slots of the two limit members, the second elastic return member pulls the two limit members closer so that the distance between the notches on one side of the two slots close to the first driving member is smaller than the width of the stop block, thereby limiting the stop block from leaving the slot.

[0039] The spacing of the notches on one side of the card slot close to the first driving member is set to be smaller than the width of the stop block, thereby improving the stability of the positioning of the stop block.

[0040] According to some examples of the first aspect of the present application, positioning surfaces are formed on the opposite inner side surfaces of the two stoppers, the positioning surfaces correspond to the stroke end position of the stop block, the positioning surfaces are located between the slope surface and the slot, a first side of the positioning surfaces is connected to the slope surface, and a second side of the positioning surfaces is connected to the slot;

[0041] When the stop block is located at the end of the stroke, the stop block fits the positioning surfaces of the two limit members.

[0042] The positioning surface corresponds to the state of the first clamping jaw and the second clamping jaw clamping the welding strip. By setting the positioning surface to cooperate with the stop block, the stable clamping operation of the welding strip is more convenient.

[0043] In a second aspect, an example of the present application provides a string welding machine, comprising the aforementioned welding ribbon pulling mechanism.

[0044] When the welding strip traction mechanism clamps the welding strip, it can effectively prevent the welding strip from tipping over, thereby greatly reducing the possibility of hidden cracks during string assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a structural schematic diagram of a welding strip traction mechanism in one embodiment of the present application;

[0046] Figure 2 The structure of the fixed seat, the sliding seat, the first clamping jaw and the second clamping jaw in one embodiment of the present application is schematically shown;

[0047] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0048] Figure 4 It is a structural schematic diagram of a sliding seat;

[0049] Figure 5 and Figure 6 A schematic diagram of the structure in which a sliding seat is driven by a driving assembly in one embodiment of the present application is shown;

[0050] Figure 7 A schematic diagram of a structure in which a stop block is restricted by a positioning assembly in an embodiment of the present application and the first clamping jaw and the second clamping jaw are positioned to a slightly open state is shown;

[0051] Figure 8 A schematic diagram of a structure in which a stop block is restricted by a positioning assembly in an embodiment of the present application and the first clamping jaw and the second clamping jaw are positioned to be in a clamping state is shown;

[0052] In the figure:

[0053] 1. Fixed seat; 10. Seat body; 11. Cover plate;

[0054] 2. Sliding seat; 21. Mounting plate; 22. Boss; 23. Concave space; 24. Stopper; 221. Accommodating cavity; 211. Mounting window

[0055] 3. first clamping jaw; 31. fixed end; 32. first contact portion;

[0056] 4. second clamping claw; 41. driven end; 42. second contact portion; 43. rotating shaft; 44. elastic component; 411. receiving groove; 412. arc-shaped protrusion;

[0057] 5. Driving assembly; 51. First driving member; 52. First elastic reset member; 53. Transmission swing arm; 531. First end; 532. Second end; 54. Transmission block; 55. Rolling member; 56. Rotating shaft; 57. Fixed block;

[0058] 6. base; 61. connection part; 62. slide rail;

[0059] 7. Limiting and positioning assembly; 71. Second driving member; 72. Limiting member; 721. Slot; 722. Slope surface; 723. Positioning surface; 73. Second elastic reset member; 74. Wedge block. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0061] A photovoltaic cell string is formed by welding the welding ribbon and the cells together in a predetermined order, and two adjacent cells are connected together by a set of welding ribbons. Specifically, the first part of the welding ribbon is welded to the main grid line on the front of the previous cell, and the second part of the welding ribbon is welded to the main grid line on the back of the next cell. In order to make the welding ribbon fit the main grid line on the surface of the cell, the area between the first and second parts of the welding ribbon needs to be flattened. The flattened welding ribbon is transported to the stringing station of the stringing machine by the welding ribbon traction mechanism, and is stacked together with the cells in a predetermined order at the stringing station.

[0062] The current ribbon pulling mechanism configured on the stringing machine generally drives the two clamping jaws to swing in opposite directions to make the two clamping jaws move closer or farther from each other, thereby clamping and releasing the ribbon. This clamping method will inevitably cause the ribbon to rotate and tip over, which will cause the flattened part of the ribbon to flip to the side, seriously affecting the quality of the stringing of the ribbon and the battery cell.

[0063] The present embodiment provides a string welding machine, which includes a welding ribbon pulling device, which uses a welding ribbon pulling mechanism to pull the welding ribbon out of the welding ribbon reel, and the welding ribbon is stretched and cut into a predetermined length, and then the welding ribbon is pulled by the welding ribbon pulling mechanism to cover the main grid line on the battery cell, and then the welding ribbon and the battery cell are welded together by a heating welding mechanism. When the welding ribbon pulling mechanism clamps the welding ribbon, it can effectively prevent the welding ribbon from tipping over, thereby greatly reducing the possibility of hidden cracks when stringing.

[0064] Combine the following Figures 1 to 8 The relevant structure and working principle (action process) of the welding strip traction mechanism given in the embodiment of the present application are further described.

[0065] Reference Figures 1 to 3 As shown, a welding tape traction mechanism provided in an embodiment of the present application includes a fixed seat 1, a sliding seat 2, a first clamping jaw 3, a second clamping jaw 4 and a driving assembly 5. The shape and construction characteristics of the above various structural components and the positional relationship, connection relationship and action coordination relationship between the structural components are described below.

[0066] The sliding seat 2 is arranged on the fixed seat 1, and the sliding seat 2 has a side facing the fixed seat 1, on which a receiving cavity 221 is formed, and the opening of the receiving cavity 221 faces the fixed seat 1, and the driving component 5 provides a driving force to act on the sliding seat 2 so that the sliding seat 2 can slide back and forth on the fixed seat 1.

[0067] The first clamping jaw 3 has a fixed end 31, which is fixedly installed at the bottom of the sliding seat 2. The first clamping jaw 3 also has a first contact portion 32 extending in a direction away from the sliding seat 2. The first contact portion 32 is located in the external space of the sliding seat 2, and is connected to the sliding seat 2 by the fixed end 31. The first contact portion 32 reciprocates synchronously with the sliding seat 2.

[0068] The second clamping jaw 4 is rotatably connected to the fixing base 1 and rotates in the same plane as the first clamping jaw 3, and the second clamping jaw 4 is located on one side of the first clamping jaw 3. The second clamping jaw 4 has a driven end 41 extending into the accommodating cavity 221 and a second contact portion 42 extending toward the external space of the fixing base 1. In order to cooperate with the first contact portion 31, the end of the second contact portion 42 is flush with the end of the first contact portion 32.

[0069] When the sliding seat 2 slides back and forth, the accommodating cavity 221 drives the driven end 41 to move, thereby causing the second contact portion 42 to rotate. The direction of rotation of the second contact portion 42 is controlled by the sliding direction of the sliding seat 2, and the direction of rotation of the second contact portion 42 includes a direction approaching the first contact portion 32 and a direction away from the first contact portion 32. The rotation of the second contact portion 42 cooperates with the reciprocating movement of the first contact portion 32 to realize the switching of the first contact portion 32 and the second contact portion 42 between the open and closed states to clamp or release the welding strip.

[0070] Figure 1 The schematic diagram shows the state of the welding strip pulling mechanism when clamping the welding strip, that is, the first clamping jaw 3 and the second clamping jaw 4 are in a parallel and close state. Figure 1 The structure, location and orientation shown, and Figure 1 The state shown is the start state, and the action process of the first clamping jaw 3 and the second clamping jaw 4 releasing the welding strip is described in detail:

[0071] The driving assembly 5 drives the sliding seat 2 to move horizontally to the left on the fixed seat 1. Since the first clamping jaw 3 is fixed on the sliding seat 2, the first clamping jaw 3 will move to the left along with the sliding seat 2. The driven end 41 of the second clamping jaw 4 is located in the accommodating cavity 221 of the sliding seat 2. When the sliding seat 2 moves to the left, the accommodating cavity 221 will synchronously push the right side surface of the driven end 41 of the second clamping jaw 4, so that the second clamping jaw 4 rotates counterclockwise. Therefore, when the sliding seat 2 moves to the left, the second contact portion 42 of the second clamping jaw 4 will swing to the right, thereby moving away from the first contact portion 31 of the first clamping jaw 3, and the welding strip is released.

[0072] The action process of the first clamping jaw 3 and the second clamping jaw 4 clamping the welding strip is opposite to the above, that is, the sliding seat 2 slides to the right, and the second clamping jaw 4 rotates clockwise synchronously.

[0073] In combination with the fixed base 1, sliding base 2, first clamping jaw 3, second clamping jaw 4 and driving assembly 5 described above, the welding strip traction mechanism provided in the embodiment of the present application drives the sliding base 2 to slide and drives the first clamping jaw 3 to move horizontally so as to approach the second clamping jaw 4. Since the driven end 41 of the second clamping jaw 4 extends into the accommodating cavity 221, the second clamping jaw 4 is driven by the accommodating cavity 221 and can swing toward the first clamping jaw 3 at the same time, so as to clamp the welding strip. This method effectively avoids the situation where the welding strip rolls over when being clamped, thereby helping to avoid the probability of hidden cracks during stringing.

[0074] It can be understood that the first clamping jaws 3 and the second clamping jaws 4 described above are configured in groups, each group includes a first clamping jaw 3 and a second clamping jaw 4, and the number of the first clamping jaws 3 (or the number of the second clamping jaws 4) can be arbitrary. Exemplarily, the sliding seat 2 is provided with a plurality of first clamping jaws 3 arranged at intervals, and the fixed seat 1 is provided with a plurality of second clamping jaws 4 arranged at intervals, the second clamping jaws 4 correspond to the first clamping jaws 3 one by one, and each second clamping jaw 4 is located on one side of a first clamping jaw 3. To this end, the number of the accommodating cavities 221 is also multiple and arranged at intervals, so that the corresponding second clamping jaws 2 can be driven, and the driven end 41 of each second clamping jaw 4 extends into the corresponding accommodating cavity 221, and each second contact portion 42 cooperates with one of the first contact portions 32 to have an open and closed state.

[0075] In some examples, the aforementioned welding strip pulling mechanism further includes an elastic component 44, the first end of the elastic component 44 abuts against the driven end 41, and the second end abuts against the inner wall of the accommodating chamber 221. The elastic component 44 can buffer the clamping force of the first clamp 3 and the second clamp 4, which helps to avoid clamping the welding strip. In specific implementation, the elastic component 44 can be a spring or other element that can provide elastic force. In order to ensure that the elastic component 44 is stably located between the inner wall of the accommodating chamber 221 and the driven end 41, a accommodating groove 411 can be formed at the driven end 41, and the first end of the elastic component 44 is disposed in the accommodating groove 411. The accommodating groove 411 is matched with the size of the first end so that the first end is firmly clamped.

[0076] In some implementation examples, the side wall of the driven end 41 away from the elastic component 44 is configured as an arcuate protrusion 412, which abuts against the inner wall of the accommodating cavity 221. Forming the arcuate protrusion 412 and abutting against the inner wall of the accommodating cavity 221 helps to enhance the controllability of the rotation of the second clamping jaw 4.

[0077] In one embodiment, a rotating shaft 43 is provided on the fixed base 1, and the middle part of the second clamping jaw 4 is installed on the rotating shaft 43, and the second clamping jaw 4 can rotate around the rotating shaft 43 in the plane where the first contact portion 31 reciprocates, and the second clamping jaw 4 can rotate around the rotating shaft 43 to make the second contact portion 42 of the second clamping jaw 4 approach or move away from the first contact portion 31, and the rotation axis defined by this rotating shaft 43 is stable and reliable.

[0078] In specific implementation, the fixing seat 1 includes a seat body 10 and a cover plate 11. A mounting groove is formed on the seat body 10. The second clamping jaw 4 is installed in the mounting groove through the rotating shaft 43. The cover plate 11 is fixedly connected to the wall surfaces on both sides of the mounting groove by screws, etc., so as to realize the assembly of the second clamping jaw 4 and the fixing seat 1. It can be understood that the mounting grooves can be set to multiple and arranged at intervals along the longitudinal direction, so that multiple second clamping jaws 4 can be assembled in this form.

[0079] See also Figure 4 As shown, combined with Figures 1 to 3 In some embodiments, the sliding seat 2 has a mounting plate 21 and a boss 22. The boss 22 and the first clamping jaw 4 are mounted on the same side of the mounting plate 21 and are respectively located at the upper and lower parts of the mounting plate 21 to form a relative arrangement, and the boss 22 and the first clamping jaw 4 are spaced apart. Moreover, the boss 22 and the first clamping jaw 4 both protrude from the surface of the mounting plate 21 on the side, and a concave space 23 is defined by the boss 22, the fixed end 41 of the first clamping jaw 4 and the mounting plate 21. The concave space 23 extends along the direction of the reciprocating sliding of the sliding seat 2, and the fixed seat 1 is located in the concave space 23, so that the sliding seat 2 and the fixed seat 1 can form a contact fit of multiple surfaces to form a wrapping form, wherein the boss 22 is formed with a receiving cavity 221 near the side wall of the fixed seat 1. Based on the wrapping of the sliding seat 2 by the concave space 221, a certain guide and support can be provided for the reciprocating sliding of the sliding seat 2, thereby helping to improve the stability of the reciprocating sliding action and avoid the deviation of the sliding seat.

[0080] See also Figures 5 to 8 As shown, in some embodiments, the aforementioned welding ribbon pulling mechanism further includes a base 6, on which a connection portion 61 and a slide rail 62 that do not interfere with each other are formed, and a mounting window 211 is formed on the mounting plate 21, and the fixed seat 1 is fixedly arranged on the connection portion 61 through the mounting window 211, and the sliding seat 2 is slidably arranged on the slide rail 62. After the mounting plate 21 is arranged on the slide rail 62, the fixed seat 1 can be fixedly connected to the connection portion 61 through the mounting window 211, and the mounting window 211 provides space for the reciprocating sliding of the mounting plate 21 on the slide rail 62 to avoid interference with the connection structure between the fixed seat 1 and the connection portion 61.

[0081] See also Figures 5 to 8 As shown, in some embodiments, the aforementioned welding strip traction mechanism also includes a base 6, the sliding seat 2 is slidably mounted on the base 6, the driving assembly 5 includes a first driving member 51, a first elastic reset member 52 and a transmission swing arm 53, wherein: one end of the first elastic reset member 52 is connected to the base 6, and the other end is connected to the sliding seat 2, the first elastic reset member 52 provides a force to reset the sliding seat 2, and the reset force separates the second contact portion 42 from the first contact portion 41; the transmission swing arm 53 can be a V-shaped structure, the middle part of the transmission swing arm 53 is mounted on the base 6 through a rotating shaft 56, the transmission swing arm 53 is constructed to rotate in a plane around the rotating shaft 56, and the first end 531 of the transmission swing arm 53 is rotationally connected to the driving end of the first driving member 51, the second end 532 of the transmission swing arm 53 provides a force to make the sliding seat 2 slide, and the sliding force causes the second contact portion 42 to close with the first contact portion 32.

[0082] Continue to see Figures 5 to 8As shown, when the driving end of the first driving member 51 extends toward the end of the stroke, the transmission swing arm 53 is driven to rotate, thereby driving the transmission swing arm 53 to push the sliding seat 2 to make it slide, and this sliding makes the second contact portion 42 contact with the first contact portion 32 and be in a closed state; and when the driving end of the first driving member 51 shrinks and resets toward the beginning of the stroke, the transmission swing arm 53 is reset (the direction in which the transmission swing arm 53 is reset is opposite to the direction in which the transmission swing arm 53 pushes the sliding seat 2), and the sliding seat 2 is reset under the pull of the first elastic reset member 52 (the direction in which the sliding seat 2 is reset is opposite to the direction in which it slides due to the push of the transmission swing arm 53), and the second clamping jaw 4 and the first clamping jaw 3 are also reset, that is, the second contact portion 42 is not in contact with the first contact portion 32 and is in an open state.

[0083] See also Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, in order to avoid the second end directly pushing against the sliding seat and causing greater wear, in some instances, the second end 532 of the transmission swing arm 53 is provided with a rolling component 55, and the rolling component 55 is used to push against the sliding seat 2. Exemplarily, the rolling component 55 can be a roller, a roller or other element with a rotation axis and a circumferential surface rotating around the rotation axis that can be used to push the sliding seat 2. In the process of pushing the sliding seat 2, the rolling component can rotate around its own axis due to friction. The action of the rolling component 55 on the sliding seat 2 helps to reduce wear.

[0084] See also Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, in one embodiment of the present application, a stopper 24 is provided on the sliding seat 2, and the rolling component 55 acts on the stopper 24. The stopper 24 increases the force-bearing surface of the resisting action, thereby improving the stability of the resisting action.

[0085] Combination Figure 6 As shown, in a specific implementation, the first elastic reset member 52 can be a spring, one end of which is fixed on the base 6, and the other end is fixed on the stopper 24. When the rolling member 55 pushes the sliding seat to the right, the spring is stretched; when the rolling member 55 resets to the left, the spring contracts and resets, pulling the stopper 24 back to the initial position.

[0086] See also Figure 6 The structure, location and orientation shown, and Figure 6The state shown is the start state, and the action process of the first clamping jaw 3 and the second clamping jaw 4 to achieve clamping or releasing is described in detail as follows: the driving end of the first driving member 51 extends to the left, driving the rolling member 55 to push the sliding seat 2 to the right, and the sliding seat 2 moves to the right. When the first clamping jaw 3 approaches the second clamping jaw 4, the second contact portion 42 of the second clamping jaw 4 swings toward the first contact portion 32 of the first clamping jaw 3, and the two contact portions are close together to achieve the welding strip clamping. The driving end of the first driving member 51 shrinks to the right, the rolling member 55 is reset, the stopper 24 is reset under the pull of the first elastic reset member 52 (a spring can be used in the specific implementation), the sliding seat 2 follows the stopper 24 to reset, the second contact portion 42 of the second clamping jaw 4 swings to reset, the first contact portion 32 of the first clamping jaw 3 is reset, and the separation of the first contact portion 32 and the second contact portion 42 achieves the release of the welding strip.

[0087] See also Figure 1 , Figure 7 , Figure 8 As shown, in some embodiments, the aforementioned welding ribbon traction mechanism also includes a transmission block 54 and a limiting positioning component 7, one end of the transmission block 54 is installed on the driving end of the first driving member 51, the middle part of the transmission block 54 is rotatably connected to the first end 531 of the transmission swing arm 53, and the other end of the transmission block 54 (that is, the end away from the first driving component 51) is provided with a fixed block 57, and the limiting positioning component 7 has a limiting positioning function, which can limit the fixed block 57 to the first position. When the fixed block 57 is in the first position, the first contact portion 32 and the second contact portion 42 are in a slightly opened state between the opening and closing states, and the clamp between the first contact portion 32 and the second contact portion 42 is detached from the clamp due to its own weight, and the welding ribbon is released in the slightly opened state, and the horizontal movement space of the welding ribbon is small, which helps to reduce the situation where the welding ribbon is offset after being placed on the battery cell group.

[0088] See also Figure 1 , Figure 7 , Figure 8As shown, in one embodiment, the limiting positioning assembly 7 includes a second driving member 71, two limiting members 72, a second elastic reset member 73 and a wedge block 74, wherein: the two limiting members 72 are arranged oppositely on both sides of the fixing block 57, and the two limiting members 72 extend along the stroke direction of the fixing block 57, the two limiting members 72 are rotatably set on the base 6 at one end close to the first driving member 51, and the other ends of the two limiting members 72 are respectively connected to the two ends of the second elastic reset member 73, and the second elastic reset member 73 provides elastic pulling force to make the other ends of the two limiting members 72 approach each other, and a slot 721 corresponding to the first position is formed on the opposite inner side surfaces of the two limiting members 72, and the slot 721 is used to clamp and position the fixing block 57, so that the first contact portion 32 and the second contact portion 42 can be stably in a slightly open state. The limiting member 72 has an inner side surface extending from the slot 721 to a side close to the second driving member 71, and the inner side surface is formed with a ramp surface 722, and the distance between the ramp surfaces 722 of the two limiting members 72 increases continuously in the extending direction from the slot 721 to the second driving member 71. The driving end of the second driving member 71 is connected to the wedge block 74, and the second driving member 71 drives the wedge block 74 to move toward the direction of the stop block 57, and the wedge block 74 pushes the ramp surfaces 722 of the two limiting members 72 to separate the two limiting members 72. As the two limiting members 72 rotate outward under the action of the wedge block 74, the limiting positioning of the stop block 57 by the slot 721 is released. Under the tensioning action of the second elastic reset member 73 and the cooperation of the ramp surface 722 and the wedge block 74, the action of the stop block 57 (such as being limited by the slot 721 or released by releasing the limiting positioning) is more controllable.

[0089] See also Figure 1 , Figure 7 , Figure 8 As shown, in some instances, in order to improve the stability of the positioning of the stop block 57 restricted by the slot 721, when the stop block 57 is located in the slots of the two limiting members 72, the second elastic return member 71 pulls the two limiting members 72 closer, so that the spacing between the notches on one side of the two slots 721 close to the first driving member 71 is smaller than the width of the stop block 57, so as to limit the stop block 57 from leaving the slot 721.

[0090] See also Figure 1 , Figure 7 , Figure 8As shown, in some embodiments, positioning surfaces 723 are formed on the inner side surfaces of the two stoppers 72 that are opposite to each other. The positioning surfaces 723 are located on both sides of the position where the end of the stroke of the stopper 57 is located. The positioning surfaces 723 are located between the slope surface 722 and the slot 721. The first side 722 of the positioning surface 723 is connected to the slope surface, and the second side of the positioning surface 723 is connected to the slot 721. When the stopper 57 is located at the end of the stroke, the stopper 57 fits the positioning surfaces 723 of the two stoppers 72. When the stopper 57 is located at the end of the stroke, the first clamping jaw 3 and the second clamping jaw 4 are closed to clamp the welding strip. By configuring the positioning surface 723 to cooperate with the stopper 57 located at the end of the stroke, the position of the stopper 57 is stabilized, ensuring that the stopper 57 will not be subject to interference forces that cause its position to deviate during the stroke, thereby ensuring stable clamping of the welding strip.

[0091] See also Figure 8 The structure, location and orientation shown, and Figure 8 The state shown is the start state, and the action process of the first clamping jaw 3 and the second clamping jaw 4 to achieve the slightly opened state is described in detail as follows: Figure 8 In the state shown, the stopper 57 is located between the positioning surfaces 723 of the two stoppers 72 (it should be noted that Figure 8 In order to clearly show the various structural components, the two limit members 72 are in an open state, and the actual state should be: the positioning surfaces 723 of the two limit members 72 are tightly attached to the two sides of the fixed block 57 under the pull of the second elastic reset member 73), the first clamping jaw 3 and the second clamping jaw 4 are in a state of clamping the welding strip. At this time, the fixed block 57 is at the end of the stroke of the first driving member 51; after the welding strip traction mechanism transports the clamped welding strip to the string assembly station, the driving end of the first driving member 51 shrinks toward the beginning of the stroke, and the fixed block 57 moves to the slot 721 of the limit member 72 (refer to Figure 7 The first and second clamping jaws 3 and 4 are in a slightly open state, and the welding ribbon is separated from the welding ribbon pulling mechanism and falls on the string assembly station. The slightly open state is a state in which the clamped object between the first contact portion 32 and the second contact portion 42 is separated from the clamping state due to its own weight.

[0092] The process from the slightly opened state to the fully opened state as described above is as follows: Figure 8 As shown, the second driving member 71 drives the wedge block 74 to push the slope surfaces 722 of the two limiting members 72, so that the two limiting members 72 move away from each other, and the spacing between the two slots 721 is greater than the width of the fixed block 57, so that the fixed block 57 can be separated from the slot 721. At this time, the first clamping jaw 3 and the second clamping jaw 4 are in a fully open state, and the driving end of the first driving member 51 also retracts to the starting end of the stroke on the right side.

[0093] The process from the fully open state to the clamped state as described above is as follows: the driving end of the first driving member 51 moves leftward to the end of the stroke, at which time the stop block 57 is just located at the positioning surfaces 723 of the two limiting members 72. The second driving member 71 drives the wedge block 74 to return to its original position, and after the limiting member 72 loses the push of the wedge block 74, the positioning surface 723 returns to its original position. Figure 8 As shown, the position is close to the stop block 57. At this time, the first clamping jaw 3 and the second clamping jaw 4 can clamp the welding strip.

[0094] In addition, the embodiment of the present application also discloses a string welding machine, which includes the aforementioned welding strip pulling mechanism. When the welding strip pulling mechanism clamps the welding strip, it can effectively prevent the welding strip from tipping over, thereby greatly reducing the possibility of hidden cracks during stringing.

[0095] It should be noted here that the above stringer includes the welding tape pulling mechanism described in the above embodiment, and has the same beneficial effects as the above welding tape pulling mechanism embodiment, so it is not described in detail. For technical details not disclosed in the embodiment of the stringer of this application, technicians in this field can refer to the description of the welding tape pulling mechanism in the previous text for understanding, and in order to save space, it is not described in detail here.

[0096] Based on the foregoing description, the advantages of the welding tape traction mechanism in this embodiment include but are not limited to the following aspects: the sliding seat 2 is driven to slide on the fixed seat 1, so that the second clamping jaw 4 slides relative to the first clamping jaw 3 (closer to or away from the first clamping jaw 3), and the second clamping jaw 3 is synchronously driven to rotate (closer to or away from the first clamping jaw 3), so that the distance between the first contact portion 32 of the first clamping jaw 3 and the second contact portion 42 of the second clamping jaw 4 can be adjusted, so as to achieve the clamping or loosening of the welding tape and avoid the welding tape from rotating and tipping over when being clamped; an elastic component 44 is arranged between the driven end 41 of the second clamping jaw 4 and the inner wall of the accommodating cavity 221, and the elastic force of the elastic component 44 can buffer the first clamping jaw 3 and the second The clamping force of the clamping jaw 4 helps to avoid pinching the welding strip; the slot 721 of the limiting member 72 can stably limit the positioning of the stop block 57 so that the first clamping jaw 3 and the second clamping jaw 4 are in a slightly open state. The welding strip is released in this state, which helps to avoid the welding strip from shifting after being placed in the battery cell group; and the positioning surface 723 of the limiting member 72 can stably limit the positioning of the stop block 57 so that the first clamping jaw 3 and the second clamping jaw 4 are in a relatively stable state of clamping the welding strip; the second driving member 71 drives the wedge block 74 to act on the slope surface 723, so that the limiting member 72 can be opened to release the stop block 57, and the stop block 57 can move freely to the beginning of the stroke, so that the first clamping jaw 3 and the second clamping jaw 4 are in a fully open state.

[0097] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0098] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present application according to the specific circumstances.

[0099] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present application and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present application.

[0100] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0101] Although multiple embodiments of the present application have been shown and described herein, it is obvious to those skilled in the art that such embodiments are provided only by way of example. Those skilled in the art can think of many changes, modifications and alternatives without departing from the thought and spirit of the present application. It should be understood that in the process of practicing the present application, various alternatives to the embodiments of the present application described herein can be adopted. The attached claims are intended to limit the scope of protection of the present application, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A welding strip pulling mechanism, characterized in that: The welding ribbon traction mechanism comprises a fixed seat, a sliding seat, a driving assembly, a first clamping jaw and a second clamping jaw, wherein: The sliding seat is located on the fixed seat, a receiving cavity is formed on one side of the sliding seat facing the fixed seat, and the driving assembly drives the sliding seat to slide back and forth on the fixed seat; The first clamping jaw has a fixed end and a first contact portion extending toward the outer space of the sliding seat, and the fixed end of the first clamping jaw is fixedly connected to the sliding seat; The second clamping jaw is rotatably connected to the fixing seat and is located on one side of the first clamping jaw, and the second clamping jaw has a driven end extending into the accommodating cavity and a second contact portion extending toward the external space of the fixing seat; When the sliding seat slides back and forth, the accommodating cavity drives the driven end to move so that the second contact part rotates toward or away from the first contact part, and the rotation of the second contact part cooperates with the reciprocating movement of the first contact part to achieve the switching of the first contact part and the second contact part between the open and closed states to clamp or release the welding strip.

2. The welding strip pulling mechanism according to claim 1, characterized in that: The welding ribbon pulling mechanism further comprises an elastic component, a first end of the elastic component abuts against the driven end, and a second end of the elastic component abuts against an inner wall of the accommodating cavity.

3. The welding strip pulling mechanism according to claim 2, characterized in that: The driven end is formed with a receiving groove, and the first end of the elastic component is arranged in the receiving groove.

4. The welding strip pulling mechanism according to claim 2, characterized in that: The side wall of the driven end facing away from the elastic component is configured as an arc-shaped protrusion, and the arc-shaped protrusion abuts against the inner wall of the accommodating cavity.

5. The welding strip pulling mechanism according to claim 1, characterized in that: The fixing seat is provided with a rotating shaft, the middle part of the second clamping jaw is installed on the rotating shaft, and the second clamping jaw can rotate around the rotating shaft in the plane where the first contact part reciprocates.

6. The welding strip pulling mechanism according to claim 1, characterized in that: The sliding seat has a mounting plate and a boss, the boss and the first clamping jaw are installed at an upper and lower interval on the same side of the mounting plate and protrude from the mounting plate, and the boss, the fixed end of the first clamping jaw and the mounting plate form a concave space extending along the reciprocating sliding direction of the sliding seat, the fixed seat is located in the concave space, and the boss forms the accommodating cavity near the side wall of the fixed seat.

7. The welding strip pulling mechanism according to claim 6, characterized in that: The welding strip traction mechanism also includes a base, on which a connecting portion and a slide rail that do not interfere with each other are formed, and an installation window is formed on the installation plate. The fixed seat passes through the installation window and is fixedly arranged on the connecting portion, and the sliding seat is slidably arranged on the slide rail.

8. The welding strip pulling mechanism according to any one of claims 1 to 7, characterized in that: The welding ribbon traction mechanism further comprises a base, the sliding seat is slidably mounted on the base, and the driving assembly comprises a first driving member, a first elastic reset member and a transmission swing arm, wherein: One end of the first elastic reset member is connected to the base, and the other end is connected to the sliding seat, the first elastic reset member provides a force to reset the sliding seat, and the reset force causes the second contact portion to separate from the first contact portion; The middle part of the transmission swing arm is installed on the base through a rotating shaft, and the transmission swing arm is constructed to rotate in a plane around the rotating shaft, and the first end of the transmission swing arm is rotationally connected to the driving end of the first driving member, and the second end of the transmission swing arm provides a force to make the sliding seat slide, and the sliding force makes the second contact part close with the first contact part.

9. The welding strip pulling mechanism according to claim 8, characterized in that: The second end of the transmission swing arm is provided with a rolling component, and the rolling component is used to push the sliding seat.

10. The welding strip pulling mechanism according to claim 9, characterized in that: A stopper is arranged on the sliding seat, and the rolling component acts on the stopper.

11. The welding strip pulling mechanism according to claim 8, characterized in that: The welding belt traction mechanism also includes a transmission block and a limiting positioning assembly, wherein the transmission block is mounted on the driving end of the first driving member, and the middle portion of the transmission block is rotatably connected to the first end of the transmission swing arm; A stop block is provided at one end of the transmission block close to the limiting positioning assembly, and the limiting positioning assembly is used to limit the stop block to a first position. When the stop block is in the first position, the first contact portion and the second contact portion are in a slightly opened state between the opening and closing states, and the clamped object between the first contact portion and the second contact portion is disengaged due to its own weight.

12. The welding strip pulling mechanism according to claim 11, characterized in that: The limiting and positioning assembly includes two limiting members, a second driving member, a second elastic reset member and a wedge block, wherein: The two limiting members are arranged opposite to each other on both sides of the stop block and extend along the stroke direction of the stop block. One end of the two limiting members close to the first driving member is rotatably arranged on the base. A second elastic reset member that allows the two limiting members to approach each other is arranged between the other ends of the two limiting members. A clamping groove corresponding to the first position is formed on the inner side surfaces opposite to each other of the two limiting members, and the clamping groove is used to clamp and position the stop block. A slope surface is formed on the inner side surface of the limiting member extending from the clamping groove to the side close to the second driving member, and the distance between the slope surfaces of the two limiting members increases continuously from the clamping groove to the extending direction of the second driving member. The driving end of the second driving member is connected to the wedge block, and the second driving member drives the wedge block to move toward the stop block. The wedge block pushes the slope surfaces of the two limiting members to rotate the two limiting members outward and apart, thereby releasing the restriction on the stop block.

13. The welding strip pulling mechanism according to claim 12, characterized in that: When the stop block is located in the slots of the two limiting members, the second elastic return member pulls the two limiting members closer, so that the distance between the notches on one side of the two slots close to the first driving member is smaller than the width of the stop block, so as to limit the stop block from leaving the slot.

14. The welding strip pulling mechanism according to claim 12, characterized in that: A positioning surface is formed on the inner side surfaces opposite to each other of the two stoppers, the positioning surface corresponds to the stroke end position of the stop block, the positioning surface is located between the slope surface and the slot, a first side of the positioning surface is connected to the slope surface, and a second side of the positioning surface is connected to the slot; When the stop block is located at the end of the stroke, the stop block is in contact with the positioning surfaces of the two limit members.

15. A string welding machine, characterized in that: It comprises the welding strip traction mechanism as described in any one of claims 1 to 14.

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