Variable-pitch adjusting support and drawstring

Abstract

The utility model discloses a variable pitch adjusting support and drawstring, relates to battery cell conveying technical field, on one hand, the adjusting support comprises a connecting assembly and a driving member, the connecting assembly comprises two connecting members arranged in a staggered manner, one connecting member is used for connecting with a roller wall clamped on one side of a battery cell, and the other connecting member is used for connecting with a roller wall clamped on the other side of the battery cell; the other connecting piece is used for being connected with a roller wall clamped on the other side of the battery cell; the two output ends of the driving piece are respectively connected with the two connecting pieces, and the connecting pieces are driven to move in opposite or opposite directions, so that the channel width of the two roller walls clamped on the two sides of the battery cell is adjusted. On the other hand, the drawstring comprises the adjusting support, a rack and a roller wall. The two connecting pieces are arranged and are respectively connected with the two roller walls clamped on the two sides of the battery cell, so that the movement of the corresponding roller walls is driven by controlling the movement of the connecting pieces, and the width of a channel for clamping the battery cell between the two roller walls is adjusted to adapt to battery cells of different models.

Description

Technical Field

[0001] The utility model relates to the technical field of battery core transportation, and in particular to an adjustable bracket and a pull belt with a variable distance. Background Art

[0002] With the rapid development of the automotive energy and electric vehicle industries, battery cells are being used more and more widely. When processing battery cells, pull-belt wires are often used, and pull-belt wires are usually used for transporting battery cells in the new energy industry.

[0003] When the battery cell is changed, the pull tape line used in the existing production line needs to replace the corresponding roller wall to adapt to the battery cell of the same size. It cannot adapt to all types of battery cells, and it is necessary to manually measure the appropriate spacing to adjust the pull tape on site when changing the type. There are many parts involved and the changeover time is long. The degree of automation is too low, and flexible production cannot be achieved. The labor intensity of workers is high, the labor cost is too high, and the productivity is low. At the same time, the manual adjustment accuracy is insufficient, which can easily lead to card jams, which is not conducive to the normal operation of production and the maintenance of the production line. Utility Model Content

[0004] In view of the defects existing in the prior art, the purpose of the present utility model is to provide a variable-distance adjustment bracket and pull strap to solve the problem that the pull strap in the prior art needs to be manually changed to adapt to the production of different types of battery cells, resulting in long changing time and insufficient adjustment accuracy.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] In one aspect, the present application provides a variable-distance adjustment bracket, comprising:

[0007] A connection assembly, comprising two connection pieces arranged staggered, wherein one connection piece is used to connect with a roller wall clamped on one side of the battery cell, and the other connection piece is used to connect with a roller wall clamped on the other side of the battery cell;

[0008] The driving member includes an output end, both ends of which are respectively connected to two connecting members, and drives the connecting members to move in opposite directions to adjust the width of the channel of the roller walls clamped on both sides of the battery cell.

[0009] In some optional embodiments, the connecting member is a gantry bracket, comprising:

[0010] A connecting rod connected to an output end of the driving member;

[0011] The supporting leg has one end connected to the connecting rod and the other end used for one-to-one connection with the roller wall.

[0012] In some optional embodiments, the driving member includes:

[0013] A bidirectional screw rod, the length direction of which is perpendicular to the length direction of the roller wall, and opposite threads are provided at both ends of the bidirectional screw rod;

[0014] Two sliders are respectively threadedly connected to the two ends of the bidirectional screw rod, and each of the sliders is respectively connected to a connecting piece;

[0015] The output end of the servo motor is connected to the bidirectional lead screw to drive the bidirectional lead screw to rotate and drive the two sliders to move.

[0016] In some optional embodiments, an auxiliary connection component is further included, which is used to arrange the connection components at intervals along the length direction of the roller wall. The auxiliary connection component includes two auxiliary connectors, one of which is used to connect to the roller wall clamped on one side of the battery cell, and the other auxiliary connector is used to connect to the roller wall clamped on the other side of the battery cell, and the two auxiliary connectors are respectively connected to the two connectors via linkage components.

[0017] In some optional embodiments, a support frame is further included, which includes two support legs located on both sides of the width direction of all roller walls and a support rod connected to the two support legs, the support rod is suspended above all roller walls, and the driving member is connected to the support rod.

[0018] In some optional embodiments, the height of the support legs is adjustable.

[0019] In a second aspect, the present application also provides a drawstring with a variable distance, comprising:

[0020] a stand on which a belt for transferring the battery cells is provided;

[0021] At least one group of roller wall groups is arranged above the belt, each group of roller wall groups includes two roller walls for clamping on both sides of the battery cell, and the length direction of the roller wall is the same as the transmission direction of the belt;

[0022] A connection assembly, comprising two connection pieces arranged staggered, wherein one connection piece is used to connect with a roller wall clamped on one side of the battery cell, and the other connection piece is used to connect with a roller wall clamped on the other side of the battery cell;

[0023] The driving member includes an output end, both ends of which are respectively connected to two connecting members, and drives the connecting members to move in opposite directions to adjust the width of the channel of the roller walls clamped on both sides of the battery cell.

[0024] In some optional embodiments, a sliding track is provided on the platform, and all roller walls are slidably connected to the sliding track.

[0025] In some optional embodiments, each roller wall includes a plurality of rollers arranged at intervals along the moving direction of the belt, and the rollers are rubber-covered bearings.

[0026] In some optional embodiments, a photoelectric sensor is further included, which is connected to the driving member signal of the belt.

[0027] Compared with the prior art, the advantage of the utility model lies in that: by setting two connecting pieces, and the two connecting pieces are respectively connected to the roller walls on one side of all the roller wall groups clamped on both sides of the battery cell, the movement of the corresponding roller wall is driven by controlling the movement of the connecting piece, thereby adjusting the width of the channel formed between the two roller walls for clamping the battery cell to adapt to different models of battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of the structure of a variable-distance adjustment bracket and a drawstring of the utility model;

[0030] Figure 2 for Figure 1 A front view schematic diagram of

[0031] Figure 3 for Figure 1 A side view schematic diagram of

[0032] Figure 4 for Figure 1 Schematic diagram of the connection between the middle driving parts, connecting parts and auxiliary connecting parts.

[0033] In the figure: 1. Connecting part; 11. Connecting rod; 12. Support leg; 2. Battery cell; 3. Roller wall; 31. Roller; 4. Driving part; 41. Bidirectional screw; 42. Sliding block; 43. Servo motor; 5. Support frame; 51. Support leg; 52. Support rod; 53. Support plate; 531. Slide rail; 6. Auxiliary connecting part; 61. Linkage assembly; 611. Connecting rod; 612. Vertical rod; 7. Stand; 71. Belt; 72. Sliding track; 73. Stand support leg; 74. Auxiliary support leg; 8. Photoelectric sensor. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] The following is a further detailed description of an embodiment of a variable-distance adjustment bracket and a drawstring of the utility model in conjunction with the accompanying drawings.

[0036] On the one hand, if Figures 1 to 3 As shown, the present application provides a variable-distance adjustment bracket, including a connecting component and a driving member, wherein the driving member is used to drive the connecting component to move, and the movement of the connecting component drives the movement of the roller wall, thereby adjusting the width of the channel formed between the two roller walls for clamping the battery cell to accommodate different models of battery cells.

[0037] Specifically, the connection component includes two staggered connection members 1, one of the connection members 1 is used to connect to the roller wall 3 clamped on one side of the battery cell 2, and the other connection member 1 is used to connect to the roller wall 3 clamped on the other side of the battery cell 2; the two ends of the output end of the driving member 4 are respectively connected to the two connection members 1, and by driving the connection members 1 to move in opposite directions, the channel width of the two roller walls 3 clamped on both sides of the battery cell 2 can be adjusted.

[0038] It can be understood that the two roller walls 3 clamped on both sides of the battery cell are a roller wall group, and the two roller walls 3 of each roller wall group are respectively connected to a connector 1, so that the roller walls 3 connected by the two connectors 1 are arranged alternately. When the driving member 4 is started, the two connectors 1 change their positions accordingly, thereby changing the spacing between the roller walls 3 on both sides of the battery cell 2, and realizing the change in the width of the battery cell transfer channel to adapt to the transportation of different types of battery cells.

[0039] In some optional embodiments, the above-mentioned connecting member 1 is a gantry bracket, including a connecting rod 11 and a support leg 12, the connecting rod 11 is connected to the output end of the above-mentioned variable pitch drive member 4; one end of the support leg 12 is connected to the above-mentioned connecting rod 11, and the other end is used to be connected one-to-one with the above-mentioned roller wall 3.

[0040] It can be understood that the number of the supporting legs 12 connected to the connecting member 1 is the same, and all the roller walls 3 connected to the connecting member 1 are caused to move synchronously through the connecting rod 11 .

[0041] In this example, the two gantry supports are staggered and partially overlap.

[0042] Taking the present application as an example, there are eight channels for clamping the battery cells, corresponding to nine roller walls 3. The nine roller walls 3 are numbered from left to right, with the odd-numbered roller walls 3 connected to the five legs 12 of one connector 1, and the even-numbered roller walls 3 connected to the four legs 12 of another connector 1, and the two connectors 1 partially overlap. When the two connectors 1 move toward the overlapping part, the two roller walls 3 on both sides of the channel will be brought closer, and when the two connectors 1 move away from the overlapping part, the two roller walls 3 on both sides of the channel will be moved away.

[0043] In some optional embodiments, the variable pitch drive member 4 includes a bidirectional screw rod 41, two sliders 42 and a servo motor 43. The length direction of the bidirectional screw rod 41 is used to be perpendicular to the length direction of the roller wall 3. The two ends of the bidirectional screw rod 41 are respectively provided with reverse threads; the two sliders 42 are respectively threadedly connected to the two ends of the bidirectional screw rod 41, and each of the sliders 42 is respectively connected to a connecting member 1; the output end of the servo motor 43 is connected to the bidirectional screw rod 41 to drive the bidirectional screw rod 41 to rotate and drive the two sliders 42 to move.

[0044] When the servo motor 43 drives the bidirectional lead screw 41 to rotate, the two sliders 42 respectively cooperate with the threads at one end of the bidirectional lead screw 41, so as to move closer to or farther away from each other. The movement of the two sliders 42 drives the two connecting parts 1 to move, and then drives the two roller walls 3 of the roller wall group to move closer to or farther away, thereby adjusting the width of the channel for clamping the battery cell 2.

[0045] The displacement of the two connectors 1 can be precisely controlled by the threaded cooperation of the bidirectional screw 41 and the slider 42. The bidirectional screw 41 can be driven by the servo motor 43 to synchronously drive the two connectors 1 to move, making it easier to adjust the width of the channel and with a fast adjustment response speed.

[0046] Of course, in other embodiments, the two connecting members 1 may also be controlled by two driving members respectively to achieve movement, but it should be noted that the movement directions of the two connecting members 1 should be opposite and preferably perpendicular to the length direction of the roller wall 3 .

[0047] In this example, the number of rotations of the motor output end can be accurately controlled by the servo motor 43 .

[0048] In some optional embodiments, such as Figure 4As shown, the above-mentioned adjustment bracket also includes at least one group of auxiliary connection components, which are used to arrange the above-mentioned connection components at intervals along the length direction of the above-mentioned roller wall 3, and the above-mentioned auxiliary connection components include two auxiliary connection members 6, one of the above-mentioned auxiliary connection members 6 is used to connect with the roller wall 3 clamped on one side of the battery cell 2, and the other auxiliary connection member 6 is used to connect with the roller wall 3 clamped on the other side of the battery cell 2, and the two above-mentioned auxiliary connection members 6 are respectively connected to the two above-mentioned connection members 1 through linkage components 61.

[0049] It can be understood that the roller wall 3 is used to assist in limiting the relative position of the battery cell when it moves on the pull belt, so the roller wall 3 usually has a certain length as needed. In this example, the connector 1 is connected to a certain point of the roller wall 3. When the connector 1 drives the roller wall 3 to move in a direction perpendicular to its length, it is necessary to ensure that all parts of the length direction of the entire roller wall 3 are displaced, and the displacement is the same, so that the channels formed by the two roller walls 3 have the same width from the starting point to the end point. Therefore, an auxiliary connection component is set along the length direction of the roller wall 3, so that the roller wall 3 can move synchronously in the length direction to avoid imbalance when the roller wall 3 moves due to a single point force.

[0050] In this example, the two auxiliary connecting members 6 of the auxiliary connecting assembly are also gantry brackets, which have the same structure as the above-mentioned connecting member 1, and the roller wall connected to each auxiliary connecting member 6 is also the same as its corresponding connecting member 1.

[0051] Specifically, Figure 2 As shown, the auxiliary connecting member 6 and the connecting member 1 are connected via a linkage assembly 61 . When the connecting member 1 moves driven by the driving member 4 , the corresponding auxiliary connecting member 6 is synchronously driven to move via the linkage assembly 61 .

[0052] In some optional embodiments, the above-mentioned adjustment bracket also includes a support frame 5, which includes two support legs 51 located on both sides of the width direction of all the above-mentioned roller walls 3 and a support rod 52 connected to the two support legs 51, the above-mentioned support rod 52 is suspended above all the above-mentioned roller walls 3, and the above-mentioned driving member 4 is connected to the above-mentioned support rod 52.

[0053] That is to say, the driving member 4 is fixed above all the roller walls 3 through the support frame 5, and then connected to the roller wall 3 through the connecting member 1. The support frame 5 can prevent the driving member 4 from shaking and falling.

[0054] In this example, a support plate 53 is provided between the support rod 52 and the roller wall 3, and the support plate 53 is connected to the support rod 52 via a connecting rod. The servo motor 43 is arranged on the support plate 53, and a long hole along the length of the bidirectional screw rod 41 is opened on the support plate 53. The two sliders 42 pass through the long hole and are connected to the connecting member 1, and can move in the long hole along the length direction of the long hole.

[0055] Preferably, a slide rail 531 arranged along the length direction of the above-mentioned bidirectional screw rod 41 is provided on the side of the support plate 53 close to the roller wall 3, and the above-mentioned linkage assembly 61 includes two connecting rods 611 and four vertical rods 612. The two connecting rods 611 are respectively connected to the two sliders 42, and the two connecting rods 611 can slide along the slide rail 531. The four vertical rods 612 respectively connect the two connecting members 1 and the two auxiliary connecting members 6 with the corresponding connecting rods 611, so that when the two sliders 42 move on the bidirectional screw rod 41, the two connecting members 1 and the two auxiliary connecting members 6 are synchronously driven to move.

[0056] It can be understood that by setting the slide rail 531, both ends of the connecting rod 611 can be synchronously displaced along the length direction of the bidirectional screw rod 41, thereby driving the connecting member 1 and the auxiliary connecting member 6 corresponding to the connecting member 1 to move synchronously, so as to realize multi-point force on the roller wall 3 and avoid unbalanced movement of the roller wall 3 due to uneven force at each point when the roller wall 3 moves.

[0057] In some optional embodiments, the height of the supporting legs 51 is adjustable.

[0058] Since the driving member 4 is connected to the support frame 5 and connected to the roller wall 3 through the connecting member 1, the height of the supporting leg 51 will directly affect the height of the roller wall. The battery cell moves along the length direction of the roller wall 3 on the belt. If the roller wall 3 is too high and too far away from the belt, it will affect the guiding effect of the battery cell. Theoretically, the lower roller of the roller wall 3 is about 10 mm away from the belt surface, and considering that the battery cell needs to be grabbed at the end of the belt, the height difference between the top surface of the roller wall 3 and the upper surface of the battery cell should be greater than 1 / 3 of the height of the battery cell.

[0059] Similarly, in order to avoid the problem of inconsistent height of the roller wall 3 in its length direction, the above-mentioned support frame 5 is preferably arranged in the middle of the length direction of the roller wall 3, that is, the connection point between each support leg 12 and the roller wall 3 is located in the middle of the roller wall 3.

[0060] It can be understood that the ends of the roller wall 3 are connected by fixed guide rails, and the remaining part is suspended above the belt along the moving direction of the belt. When the roller wall 3 is too long, the part away from the end will sag due to gravity. Therefore, setting the support frame 5 in the middle of the roller wall 3 can better support the roller wall 3.

[0061] In some optional embodiments, the above-mentioned adjustment bracket also includes a control system, which includes an input module and a control module. The control module is connected to the servo motor 43 signal and is used to control the rotation direction and start and stop of the servo motor 43 according to the battery cell model input by the input module, thereby adjusting the distance between the roller walls 3 clamped on both sides of the battery cell.

[0062] On the other hand, the present application also provides a variable-length pull belt, including a stand 7, a roller wall 3 and an adjustment bracket in any of the above embodiments.

[0063] Specifically, a belt 71 for transmitting the battery cell 2 is provided on the stand 7; at least one group of roller wall groups is arranged above the above-mentioned belt 71, and each group of the above-mentioned roller wall groups includes two roller walls 3 for clamping on both sides of the battery cell 2, and the length direction of the above-mentioned roller walls 3 is the same as the transmission direction of the above-mentioned belt 71; the connection component includes two staggered connecting members 1, one of the above-mentioned connecting members 1 is used to connect with the roller wall 3 clamped on one side of the battery cell 2, and the other above-mentioned connecting member 1 is used to connect with the roller wall 3 clamped on the other side of the battery cell 2; the two ends of the output end of the driving member 4 are respectively connected to the two above-mentioned connecting members 1, and by driving the above-mentioned connecting members 1 to move in opposite directions, the channel width of the two roller walls 3 clamped on both sides of the battery cell 2 can be adjusted.

[0064] It can be understood that the battery cells 2 are transmitted on the belt 71, and each group of roller walls corresponds to a column of battery cells, which guides the transmission of the battery cells on the belt 71 and maintains the direction of the battery cells on the belt.

[0065] In this example, the stand 7 is used as the main support mechanism for the pull line, so a plurality of stand support legs are provided for support, and the stand support legs 73 are also connected by profiles to prevent the stand from shaking when the battery cell passes through. An auxiliary support leg 74 is also provided on one side of the stand support leg 73. The auxiliary support leg 74 is tilted and has an angle with the stand support leg 73, so that a triangular stable structure is formed when placed on the ground, making the pull line more stable. The auxiliary support leg 74 and the stand support leg 73 are fixed by ground bolts.

[0066] In some optional embodiments, a sliding track 72 is provided on the stand 7 , and all the roller walls 3 are slidably connected to the sliding track 72 .

[0067] Specifically, the sliding track 72 is arranged perpendicular to the moving direction of the belt 71 and is located at one end of the moving direction of the belt 71. The ends of all roller walls 3 are slidably connected to the sliding track 72, and the middle part is connected to the support frame 5 through the connecting assembly and the driving member 4. When the driving member 4 drives the roller wall 3 to move, the end of the roller wall 3 slides on the sliding track 72.

[0068] By providing the sliding rail 72 , not only can all the roller walls 3 be positioned so that they can move in coordination with the adjusting bracket, but the sliding rail 72 also plays a supporting role for the roller walls 3 together with the adjusting bracket.

[0069] In some optional embodiments, each of the roller walls 3 includes a plurality of rollers 31 arranged at intervals along the moving direction of the belt 71 , and the rollers 31 are rubber-coated bearings.

[0070] It is understood that when the battery cell moves with the belt between the two roller walls 3, the roller wall 3 plays a guiding role while minimizing the friction between the battery cell and the belt. The axial direction of the multiple rollers 31 is perpendicular to the belt 71, and the rotation direction of the rollers 31 is consistent with the movement direction of the belt.

[0071] In this example, in order to reduce the wear of the roller 31 on the battery cell, the roller is set as a rubber-coated bearing. The rubber-coated material is polyurethane, which has a soft texture and will not cause damage to the battery cell even if it is bumped.

[0072] In some optional embodiments, the drawstring further includes a photoelectric sensor 8 , which is connected to the driving member signal of the belt 71 .

[0073] It can be understood that the function of the photoelectric sensor 8 is to detect whether the battery cell 2 is in place, thereby controlling the start and stop of the belt 71, and also has the function of preventing the battery cell from being connected.

[0074] The working principle of the embodiment of the present application is as follows: the cell model to be transmitted is input into the control system, and the control system controls the rotation direction and number of rotations of the servo motor 43 according to the cell model input by the input module, so that the two sliders 42 drive the two connectors 1 to move, and then drive the two roller walls 3 of the roller wall group to move closer or farther, so as to adjust the width of the channel for clamping the cell. Then the cell 2 is placed on the belt 71, and when the photoelectric sensor 8 senses the cell 2, the belt 71 is started, so that the cell 2 moves in the channel formed between the two roller walls 3 under the transmission of the belt.

[0075] The utility model discloses a variable-distance adjustment bracket and a pull belt, which are provided with two connecting members 1, and the two connecting members 1 are respectively connected to the roller walls 3 on one side of the roller wall groups clamped on both sides of the battery cells 2, so that the movement of the corresponding roller walls 3 is driven by controlling the movement of the connecting members 1, so as to adjust the width of the channel for clamping the battery cells formed between the two roller walls 3 to adapt to different types of battery cells; the two connecting members 1 are gantry brackets, which move with the corresponding roller walls 3 through a plurality of legs 12, so that the plurality of roller walls can move synchronously; the threaded cooperation of the bidirectional screw rod 41 and the slider 42 is utilized to precisely control the displacement of the two connecting members 1, and the bidirectional screw rod 41 can realize the driving of the servo motor 43 to synchronously drive the two connecting members 1 to move The movement makes it easier to adjust the width of the channel, and the adjustment response speed is fast; by setting the auxiliary connection component 6, it is ensured that the entire roller wall 3 is displaced at all locations in the length direction, and the displacement is the same; by setting the support frame 5, the driving member 4 is prevented from shaking and falling; the above-mentioned support frame 5 is set in the middle of the length direction of the roller wall 3 to avoid the roller wall 3 The height in the length direction is inconsistent; by setting the sliding track 72, not only can all the roller walls 3 be positioned so that they can be moved in conjunction with the adjustment bracket, but the sliding track 72 also supports the roller wall 3 together with the adjustment bracket; the photoelectric sensor 8 is used to detect whether the battery cell 2 is in place, thereby controlling the start and stop of the belt 71, and it also has the function of preventing the battery cell from being connected.

[0076] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, 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 cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0077] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0078] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A variable distance adjustment bracket, characterized in that: include: A connection assembly, comprising two connection members (1) arranged in a staggered manner, wherein one of the connection members (1) is used to connect to a roller wall (3) clamped on one side of a battery cell (2), and the other connection member (1) is used to connect to a roller wall (3) clamped on the other side of the battery cell (2); The driving member (4) comprises an output end, both ends of which are respectively connected to the two connecting members (1), and drives the connecting members (1) to move in opposite directions or in opposite directions, so as to adjust the width of the channel of the roller walls (3) clamped on both sides of the battery cell (2).

2. The adjustment bracket according to claim 1, characterized in that: The connecting member (1) is a gantry bracket, comprising: A connecting rod (11) connected to the output end of the driving member (4); A support leg (12) has one end connected to the connecting rod (11) and the other end used for one-to-one connection with the roller wall (3).

3. The adjustment bracket according to claim 1, characterized in that: The driving member (4) comprises: A bidirectional screw rod (41), the length direction of which is perpendicular to the length direction of the roller wall (3), and opposite threads are respectively provided at both ends of the bidirectional screw rod (41); Two sliders (42) are respectively threadedly connected to the two ends of the bidirectional screw rod (41), and each slider (42) is respectively connected to a connecting piece (1); The output end of the servo motor (43) is connected to the bidirectional screw rod (41) to drive the bidirectional screw rod (41) to rotate and drive the two sliders (42) to move.

4. The adjustment bracket according to claim 1, characterized in that: It also includes an auxiliary connection component, which is used to arrange the connection component at intervals along the length direction of the roller wall (3), and the auxiliary connection component includes two auxiliary connection members (6), one of the auxiliary connection members (6) is used to connect to the roller wall (3) clamped on one side of the battery cell (2), and the other auxiliary connection member (6) is used to connect to the roller wall (3) clamped on the other side of the battery cell (2), and the two auxiliary connection members (6) are respectively connected to the two connection members (1) via linkage components (61).

5. The adjustment bracket according to claim 1, characterized in that: It also comprises a support frame (5), which comprises two support legs (51) located on both sides of the width direction of all the roller walls (3) and a support rod (52) connected to the two support legs (51), the support rod (52) is suspended above all the roller walls (3), and the driving member (4) is connected to the support rod (52).

6. The adjustment bracket according to claim 5, characterized in that: The height of the supporting legs (51) is adjustable.

7. A variable-length drawstring, characterized in that: include: A stand (7) on which a belt (71) for transporting the battery cells (2) is provided; At least one group of roller wall groups is arranged above the belt (71), each group of the roller wall groups comprises two roller walls (3) for clamping on both sides of the battery core (2), and the length direction of the roller walls (3) is the same as the transmission direction of the belt (71); A connection assembly, comprising two connection members (1) arranged in a staggered manner, wherein one of the connection members (1) is used to connect to a roller wall (3) clamped on one side of a battery cell (2), and the other connection member (1) is used to connect to a roller wall (3) clamped on the other side of the battery cell (2); The driving member (4) comprises an output end, both ends of which are respectively connected to the two connecting members (1), and drives the connecting members (1) to move in opposite directions or in opposite directions, so as to adjust the width of the channel of the roller walls (3) clamped on both sides of the battery cell (2).

8. The drawstring according to claim 7, characterized in that: The platform (7) is provided with a sliding track (72), and all the roller walls (3) are slidably connected to the sliding track (72).

9. The drawstring according to claim 8, characterized in that: Each of the roller walls (3) comprises a plurality of rollers (31) arranged at intervals along the moving direction of the belt (71), and the rollers (31) are rubber-coated bearings.

10. The drawstring according to claim 8, characterized in that: It also includes a photoelectric sensor (8) which is connected to the driving member signal of the belt (71).

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