Symmetrical pitch changing device

Abstract

The utility model relates to the technical field of battery production, and discloses a symmetric pitch changing device which comprises a base, two pitch changing mechanisms and a driving assembly. The two pitch changing mechanisms are symmetrically arranged on the base; the driving assembly drives the two pitch changing mechanisms to move symmetrically. According to the symmetrical pitch changing device, due to the fact that the driving assembly drives the two first suction cup assemblies which are oppositely arranged to slide relatively, the driving stroke of the driving assembly is reduced, the structure of the driving assembly is simpler, and the driving force needed when the first suction cup assemblies and the second suction cup assemblies achieve pitch changing is met.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a symmetrical pitch-changing device. Background Art

[0002] During the battery production process, the battery busbar needs to be wrapped with glue. Its main function is to fix the battery cells, provide isolation and buffering between the battery cells, and also have heat insulation properties, reducing the impact between the battery cells and the impact of the external environment on the battery itself. This approach can improve the stability and safety of the battery, especially under bumpy and vibrating conditions and collisions.

[0003] In the prior art, the adhesive wrapping of battery busbars requires the unwinding device to unwind the adhesive tape, the glue pressing device and the glue dispensing device to cooperate in pressing the adhesive tape, and then the cutter to cut the adhesive tape into multiple sections. The adhesive dispensing device then uses multiple suction cups to absorb the adhesive tape one by one to complete the adhesive dispensing operation. Finally, the adhesive is delivered by adjusting the distance between the multiple suction cups, thus completing a round of adhesive dispensing and delivery. When the multiple suction cups are connected in sequence, the distance adjustment required by the drive assembly to drive the multiple suction cups becomes very long, making the drive assembly structure more complex and requiring a higher driving force.

[0004] Therefore, in order to solve the above technical problems, it is urgent to develop a suction cup distance changing device with a simple structure while ensuring the driving force. Utility Model Content

[0005] In order to address the deficiencies of the prior art, the utility model provides a symmetrical distance-changing device. Since the driving assembly drives the two first suction cup assemblies arranged opposite to each other to slide relative to each other, the driving stroke of the driving assembly is reduced, making the structure of the driving assembly simpler and meeting the driving force required for the first suction cup assembly and the second suction cup to achieve distance change.

[0006] The technical effects to be achieved by the present invention are achieved through the following technical solutions:

[0007] In a first aspect, the present invention provides a symmetrical pitch-changing device, comprising:

[0008] base;

[0009] Two pitch-changing mechanisms, the two pitch-changing mechanisms being symmetrically arranged on the base; and

[0010] A driving assembly, wherein the driving assembly drives the two variable pitch mechanisms to move symmetrically;

[0011] Among them, the distance changing mechanism includes: a first suction cup assembly and a second suction cup; the first suction cup assembly is slidably connected to the base, the second suction cup is slidably connected to the base, and the first suction cup assembly is limitedly connected to the second suction cup; the driving assembly drives the two first suction cup assemblies to slide relative to each other, and the first suction cup assembly drives the second suction cup to move during the sliding process, so that the second suction cup and the first suction cup assembly change the distance.

[0012] In some implementations, the base is provided with a first limiting component, and the first limiting component is used to limit the relative sliding distance of the two second suction cups.

[0013] In this implementation, by limiting the relative sliding distance of the two second suction cups, it is prevented that the second suction cups, when changing their distance, exceed the distance required for the first suction cup assembly and the second suction cup to actually deliver glue.

[0014] In some implementations, the first limiting assembly includes a limiting seat, the limiting seat is connected to the base, and a first limiting groove is formed on the limiting seat. The second suction cup is provided with a first follower block, and the first follower block is slidably set in the first limiting groove.

[0015] In this implementation, the first limiting groove is preferably a waist-shaped groove, and the mutual sliding distance between the two second suction cups can be adjusted by adjusting the sliding stroke of the first follower block in the first limiting groove.

[0016] In some implementations, the second suction cup is provided with a second limiting assembly, and the second limiting assembly is used to limit the sliding distance of the first suction cup assembly relative to the second suction cup.

[0017] In some implementations, the second limiting assembly includes a limiting plate, which is connected to the second suction cup and has a second limiting groove. The first suction cup assembly is provided with a second follower block, and the second follower block is slidably arranged in the second limiting groove.

[0018] In some implementations, the first suction cup assembly includes a plurality of first suction cups, and the limiting plates and the second follower blocks are respectively provided at both ends of the plurality of first suction cups. The limiting plates are provided with the second limiting grooves, and the second follower blocks are slidably arranged in the second limiting grooves of adjacent first suction cups so that the plurality of first suction cups are connected in sequence.

[0019] In this implementation, the second follower block of the first suction cup is slidably disposed in the second limiting groove of the adjacent first suction cup to achieve sequential limiting connection between the multiple first suction cups.

[0020] In some implementations, the base is provided with a sliding rail assembly, the first suction disc assembly is provided with a first sliding block, the second suction disc is provided with a second sliding block, and the first sliding block and the second sliding block are sequentially and slidingly connected to the sliding rail assembly.

[0021] In some implementations, the base is provided with an avoiding slot, the driving assembly is arranged on the lower bottom surface of the base, and the output end of the driving assembly is connected with a connecting block, the connecting block is arranged in the avoiding slot and connected to the side of the first suction disc assembly away from the second suction disc.

[0022] In the present implementation, the driving assembly drives the connecting block to slide along the avoiding slot, thereby driving the first suction disc assembly to slide along the upper surface of the base. Since the driving assembly is arranged on the lower bottom surface of the base, no interference is generated between the driving assembly and the first suction disc assembly and the second suction disc. The reliability of the distance change of the first suction disc assembly and the second suction disc is ensured, and the overall structure is more compact.

[0023] In some implementations, the driving assembly comprises a first driving structure and a second driving structure, and the first driving structure and the second driving structure are oppositely arranged and respectively drive the two first suction disc assemblies to slide relative to each other.

[0024] In some implementations, the first driving structure and / or the second driving structure comprises a driving cylinder and a piston rod, and the two ends of the piston rod are respectively connected to the driving cylinder and the connecting block.

[0025] In summary, the present application has at least the following advantages:

[0026] The symmetrical distance changing device provided by the present application has the following advantages: two distance changing mechanisms are symmetrically arranged on the base, the first suction disc assembly is limitingly connected to the second suction disc, and when the driving assembly drives the two first suction disc assemblies to slide along the base, the two second suction disc assemblies are driven to move, so that the distance change of the first suction disc assembly and the second suction disc is realized. Since the driving assembly drives the two oppositely arranged first suction disc assemblies to slide relative to each other, the driving stroke of the driving assembly is reduced, the structure of the driving assembly is simpler, and the driving force required for the distance change of the first suction disc assembly and the second suction disc is met. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a structural schematic view of a symmetrical distance changing device according to Embodiment 1;

[0028] Figure 2 FIG. 2 is a structural schematic view of a first limiting assembly and a second limiting assembly shown in FIG. 1; Figure 1

[0029] Figure 3 FIG. 3 is a structural schematic view of a symmetrical distance changing device according to Embodiment 2;​

[0030] Figure 4 Schematic diagram of the structure of the symmetrical pitch-changing device of Example 3;

[0031] Figure 5 for Figure 4 The structural schematic diagram of the first driving structure and / or the second driving structure is shown.

[0032] Markings in the figure:

[0033] 1. Base; 11. First limit assembly; 111. Limit seat; 112. First limit slot; 12. Slide rail assembly; 121. First slide rail; 122. Second slide rail; 13. Avoidance slot;

[0034] 2. Pitch-changing mechanism; 21. First suction cup assembly; 211. Second follower block; 212. First slider; 22. Second suction cup; 221. First follower block; 222. Second position-limiting assembly; 2221. Position-limiting plate; 2222. Second position-limiting slot; 223. Second slider;

[0035] 3. Drive assembly; 31. Connecting block; 32. First drive structure; 321. Drive cylinder; 322. Piston rod; 33. Second drive structure. DETAILED DESCRIPTION

[0036] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] Example 1:

[0039] Please see the attached Figure 1 ~Attached Figure 2 The symmetrical pitch-changing device of the present invention includes a base 1, two pitch-changing mechanisms 2 and a driving assembly 3.

[0040] Among them, see Figure 1 , Figure 1The diagram illustrates the structural relationship between the base 1, two distance-changing mechanisms 2, and the drive assembly 3 in an embodiment of the present invention. Specifically, the two distance-changing mechanisms 2 are symmetrically arranged on the base 1; the drive assembly 3 drives the two distance-changing mechanisms 2 to move symmetrically. The distance-changing mechanisms 2 include: a first suction cup assembly 21 and a second suction cup 22; the first suction cup assembly 21 is slidably connected to the base 1, the second suction cup 22 is slidably connected to the base 1, and the first suction cup assembly 21 is limitedly connected to the second suction cup 22; the drive assembly 3 drives the two first suction cup assemblies 21 to slide relative to each other, and the sliding of the first suction cup assembly 21 drives the movement of the second suction cup 22, thereby causing the second suction cup 22 and the first suction cup assembly 21 to change distance.

[0041] In this embodiment, the two second suction cups 22 and the two first suction cup assemblies 21 are symmetrically arranged on the base 1, and the first suction cup assembly 21 is limitedly connected to the second suction cup 22. In this way, when the driving assembly 3 drives the relatively arranged first suction cup assembly 21 to slide relative to each other, the second suction cup 22 assembly is driven to move, thereby causing the first suction cup assembly 21 and the second suction cup 22 to change distance. It should be noted that the specific arrangement of the two distance-changing mechanisms 2 symmetrically arranged on the base 1 is as follows: the first suction cup assembly 21, the second suction cup 22, the second suction cup 22 and the first suction cup assembly 21 are arranged and distributed in sequence. When the driving assembly 3 drives the two first suction cup assemblies 21 to slide along the base 1, the two second suction cups 22 slide as the first suction cup assembly 21 slides. Specifically, when the two first suction cup assemblies 21 approach each other, the second suction cup 22 simultaneously approaches the first suction cup assembly 21. When the two first suction cup assemblies 21 move away from each other, the second suction cup 22 moves away from the first suction cup assembly 21, so as to achieve the distance change of the first suction cup assembly 21 and the second suction cup 22.

[0042] It can be understood that since the distance changing mechanism 2 is symmetrically arranged on the base 1, the driving stroke of the driving component 3 is reduced, and the driving force requirement of the driving component 3 when the first suction cup assembly 21 and the second suction cup 22 change the distance is reduced. The overall structure is simpler and the assembly is simple while ensuring the reliability of the driving component 3 driving the first suction cup assembly 21 and the second suction cup 22 to change the distance.

[0043] In the above-mentioned symmetrical distance-changing device, the two distance-changing mechanisms 2 are symmetrically arranged on the base 1, and the first suction cup assembly 21 is limitedly connected to the second suction cup 22. In this way, when the driving assembly 3 drives the two first suction cup assemblies 21 to slide along the base 1, the two second suction cups 22 will be driven to move, thereby realizing that the first suction cup assembly 21 and the second suction cup 22 both change their distances; since the driving assembly 3 drives the two relatively arranged first suction cup assemblies 21 to slide relative to each other, the driving stroke of the driving assembly 3 is reduced, making the structure of the driving assembly 3 simpler, and meeting the driving force required for the first suction cup assembly 21 and the second suction cup 22 to achieve distance change.

[0044] In some preferred embodiments, please refer to Figure 2 , Figure 2 The specific structure of the first limiting assembly 11 in the embodiment of the utility model is shown. Specifically, the base 1 is provided with the first limiting assembly 11, and the first limiting assembly 11 is used for limiting the relative sliding distance of the two second suction cups 22. By limiting the relative sliding distance of the two second suction cups 22, it is avoided that the second suction cup 22 exceeds the distance change distance required when actually feeding glue when the distance change distance of the first suction cup assembly 21 and the second suction cup 22 is changed. Of course, by adjusting the limiting position of the first limiting assembly 11, the relative sliding distance of the two second suction cups 22 can be adjusted, so that the symmetrical distance change device can be compatible with more different specifications and sizes of battery busbars.

[0045] In some preferred embodiments, the first limiting assembly 11 comprises a limiting seat 111 connected to the base 1, and a first limiting groove 112 is formed in the limiting seat 111, the second suction cup 22 is provided with a first follower 221, and the first follower 221 is slidingly arranged in the first limiting groove 112. The first limiting groove 112 is preferably a waist-shaped groove, and by adjusting the sliding stroke of the first follower 221 in the first limiting groove 112, the mutual sliding distance between the two second suction cups 22 can be adjusted. It can be understood that in the actual glue feeding operation, when the distance change distance required between the multiple suction cups is short, the sliding stroke of the first follower 221 in the first limiting groove 112 can be shortened by setting a limiting block in the first limiting groove 112, so that the mutual sliding distance between the two second suction cups 22 can be controlled, and the symmetrical distance change device can be compatible with more different specifications and sizes of battery busbars. Preferably, the first follower 221 can be a cam follower.

[0046] In some preferred embodiments, the second suction cup 22 is provided with a second limiting assembly 222, and the second limiting assembly 222 is used for limiting the sliding distance of the first suction cup assembly 21 relative to the second suction cup 22. By limiting the sliding distance of the first suction cup assembly 21 relative to the second suction cup 22, it is avoided that the first suction cup assembly 21 exceeds the distance change distance required when actually feeding glue when the distance change distance of the first suction cup assembly 21 relative to the second suction cup 22 is changed. Of course, by adjusting the limiting position of the second limiting assembly 222, the sliding distance of the first suction cup assembly 21 relative to the second suction cup 22 can be adjusted, so that the symmetrical distance change device can be compatible with more different specifications and sizes of battery busbars. Preferably, by adjusting the limiting positions of the first limiting assembly 11 and the second limiting assembly 222, the distance change distance of the first suction cup assembly 21 relative to the second suction cup 22 and the distance change distance between the two second suction cups 22 can be made the same, that is, the equidistance distance change between the multiple suction cups is realized.

[0047] In some preferred embodiments, the second limiting assembly 222 includes a limiting plate 2221, which is connected to the second suction cup 22 and has a second limiting groove 2222 defined therein. The first suction cup assembly 21 is provided with a second follower block 211, which is slidably disposed within the second limiting groove 2222. The second limiting groove 2222 is preferably a waist-shaped groove. By adjusting the sliding stroke of the second follower block 211 within the second limiting groove 2222, the sliding distance of the first suction cup assembly 21 relative to the second suction cup 22 can be adjusted. It will be understood that the specific implementation method for adjusting the travel distance of the second limiting block within the second limiting groove 2222 is the same as the method for adjusting the travel distance of the first limiting block within the first limiting groove 112, and will not be further described herein.

[0048] In some more preferred embodiments, the first suction cup assembly 21 includes multiple first suction cups, and a limiting plate 2221 and a second follower block 211 are respectively provided at both ends of the multiple first suction cups. The limiting plate 2221 is provided with a second limiting groove 2222, and the second follower block 211 is slidably set in the second limiting groove 2222 of the adjacent first suction cup to connect the multiple first suction cups in sequence.

[0049] In this embodiment, the second follower block 211 of the first suction cup is slidably disposed within the second limiting groove 2222 of an adjacent first suction cup to achieve sequential limiting connection between the multiple first suction cups. It is understood that multiple first suction cups can be provided based on the actual requirements for adhesive coating of the battery busbar to improve the efficiency of adhesive removal and / or delivery of the symmetrical pitch-variable device.

[0050] Example 2:

[0051] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the symmetrical pitch-changing device of the utility model. Figure 3 , Figure 3 The diagram illustrates the structural relationship between the first slider 212 , the second slider 223 and the slide rail assembly 12 in the embodiment of the present invention.

[0052] The base 1 is provided with a slide rail assembly 12 , the first suction cup assembly 21 is provided with a first slider 212 , the second suction cup 22 is provided with a second slider 223 , and the first slider 212 and the second slider 223 are slidably connected to the slide rail assembly 12 in sequence.

[0053] In this embodiment, the first slider 212 and the second slider 223 are sequentially slidably connected to the rail assembly 12, allowing the first suction cup assembly 21 and the second suction cup 22 to be smoothly slidably connected to the base 1. This improves the smoothness of the distance change between the first suction cup assembly 21 and the second suction cup 22, further improving the distance change efficiency. This also makes the overall structure more stable, ensuring the balance and stability of the first suction cup assembly 21 and the second suction cup 22 during distance change.

[0054] Furthermore, the slide rail assembly 12 includes a first slide rail 121 and a second slide rail 122, and the first suction cup assembly 21 and the second suction cup 22 are respectively connected to the first slide rail 121 and the second slide rail 122 to enhance the balance and stability of the first suction cup assembly 21 and the second suction cup 22 when sliding along the base 1.

[0055] Example 3:

[0056] The difference between this embodiment and embodiment 2 is that this embodiment further optimizes the structure of the symmetrical pitch-changing device of the utility model. Figure 4 ~Attached Figure 5 .

[0057] Among them, see Figure 4 , Figure 4 The diagram illustrates the structural relationship between the drive assembly 3 and the first suction cup assembly 21 in an embodiment of the present invention. Specifically, the base 1 defines a relief groove 13, the drive assembly 3 is disposed on the lower surface of the base 1, and the output end of the drive assembly 3 is connected to a connecting block 31. The connecting block 31 extends through the relief groove 13 and connects to the side of the first suction cup assembly 21 facing away from the second suction cup 22.

[0058] In this embodiment, the driving component 3 drives the connecting block 31 to slide along the avoidance groove 13, thereby driving the first suction cup component 21 to slide along the upper surface of the base 1. Since the driving component 3 is arranged on the lower bottom surface of the base 1, there is no interference between the first suction cup component 21 and the second suction cup 22. While ensuring the reliability of the distance change of the first suction cup component 21 and the second suction cup 22, the overall structure is more compact.

[0059] In some preferred embodiments, see Figure 5 , Figure 5The diagram illustrates the structural relationship between the first drive structure 32 and the second drive structure 33 in an embodiment of the present invention. Specifically, the drive assembly 3 includes a first drive structure 32 and a second drive structure 33, which are arranged opposite to each other and respectively drive the two first suction cup assemblies 21 to slide relative to each other. The first drive structure 32 and the second drive structure 33 respectively drive the oppositely arranged first suction cup assemblies 21 to slide relative to each other along the base 1, thereby driving the second suction cup 22 to move, ensuring the driving force generated by the drive assembly 3 on the first suction cup assembly 21, thereby ensuring the reliability of the distance change between the first suction cup assembly 21 and the second suction cup 22.

[0060] In some more preferred embodiments, the first drive structure 32 and / or the second drive structure 33 includes a drive cylinder 321 and a piston rod 322, with both ends of the piston rod 322 respectively connected to the drive cylinder 321 and the connecting block 31. The drive cylinder 321 drives the piston rod 322 to extend and retract, thereby driving the connecting block 31 to move relative to the drive cylinder 321, further driving the first suction cup assembly 21 to move closer to or away from the second suction cup 22.

[0061] The symmetrical distance-changing device of the present invention has two distance-changing mechanisms 2 symmetrically arranged on the base 1, and the first suction cup assembly 21 is limitedly connected to the second suction cup 22. In this way, when the driving assembly 3 drives the two first suction cup assemblies 21 to slide along the base 1, the two second suction cups 22 will be driven to move, thereby achieving distance change of the first suction cup assembly 21 and the second suction cup 22; since the driving assembly 3 drives the two relatively arranged first suction cup assemblies 21 to slide relative to each other, the driving stroke of the driving assembly 3 is reduced, making the structure of the driving assembly 3 simpler, and meeting the driving force required for the first suction cup assembly 21 and the second suction cup 22 to achieve distance change.

[0062] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0063] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0064] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0065] In the present invention, unless otherwise expressly specified or limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] Although the present invention has been described with reference to the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and variations based on the above content. Therefore, all such substitutions, modifications and variations are included within the spirit and scope of the appended claims.

Claims

1. A symmetrical pitch-changing device, characterized in that: include: Base (1); Two pitch-changing mechanisms (2), the two pitch-changing mechanisms (2) being symmetrically arranged on the base (1); and A driving assembly (3), wherein the driving assembly (3) drives the two variable pitch mechanisms (2) to move symmetrically; The distance changing mechanism (2) comprises: a first suction cup assembly (21) and a second suction cup (22); the first suction cup assembly (21) is slidably connected to the base (1), the second suction cup (22) is slidably connected to the base (1), and the first suction cup assembly (21) is positionally connected to the second suction cup (22); the driving assembly (3) drives the two first suction cup assemblies (21) to slide relative to each other, and the first suction cup assembly (21) drives the second suction cup (22) to move during the sliding process, so that the second suction cup (22) and the first suction cup assembly (21) change the distance.

2. The symmetrical pitch-changing device according to claim 1, characterized in that: The base (1) is provided with a first limiting component (11), and the first limiting component (11) is used to limit the relative sliding distance of the two second suction cups (22).

3. The symmetrical pitch-changing device according to claim 2, characterized in that: The first limiting assembly (11) includes a limiting seat (111), the limiting seat (111) is connected to the base (1), and a first limiting groove (112) is provided on the limiting seat (111), and the second suction cup (22) is provided with a first follower block (221), and the first follower block (221) is slidably arranged in the first limiting groove (112).

4. The symmetrical pitch-changing device according to claim 1, characterized in that: The second suction cup (22) is provided with a second limiting assembly (222), and the second limiting assembly (222) is used to limit the sliding distance of the first suction cup assembly (21) relative to the second suction cup (22).

5. The symmetrical pitch-changing device according to claim 4, characterized in that: The second limiting assembly (222) comprises a limiting plate (2221), the limiting plate (2221) is connected to the second suction cup (22), and a second limiting groove (2222) is provided on the limiting plate (2221), the first suction cup assembly (21) is provided with a second follower block (211), and the second follower block (211) is slidably arranged in the second limiting groove (2222).

6. The symmetrical pitch-changing device according to claim 5, characterized in that: The first suction cup assembly (21) comprises a plurality of first suction cups, wherein the limiting plates (2221) and the second follower blocks (211) are respectively provided at both ends of the plurality of first suction cups, the limiting plates (2221) are provided with the second limiting grooves (2222), and the second follower blocks (211) are slidably arranged in the second limiting grooves (2222) of adjacent first suction cups, so that the plurality of first suction cups are connected in sequence.

7. The symmetrical pitch-changing device according to claim 1, characterized in that: The base (1) is provided with a slide rail assembly (12), the first suction cup assembly (21) is provided with a first slider (212), the second suction cup (22) is provided with a second slider (223), and the first slider (212) and the second slider (223) are slidably connected to the slide rail assembly (12) in sequence.

8. The symmetrical pitch-changing device according to claim 1, characterized in that: The base (1) is provided with a position-avoiding groove (13), the driving component (3) is arranged on the lower bottom surface of the base (1), and the output end of the driving component (3) is connected to a connecting block (31), and the connecting block (31) is passed through the position-avoiding groove (13) and connected to a side of the first suction cup component (21) facing away from the second suction cup (22).

9. The symmetrical pitch-changing device according to claim 8, characterized in that: The driving assembly (3) comprises a first driving structure (32) and a second driving structure (33), wherein the first driving structure (32) and the second driving structure (33) are arranged opposite to each other and respectively drive the two first suction cup assemblies (21) to slide relative to each other.

10. The symmetrical pitch-changing device according to claim 9, characterized in that: The first driving structure (32) and / or the second driving structure (33) comprises a driving cylinder (321) and a piston rod (322), and two ends of the piston rod (322) are respectively connected to the driving cylinder (321) and the connecting block (31).

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