Pitch changing device

Abstract

The utility model relates to the technical field of battery production, and discloses a pitch changing device which comprises a base, a first suction cup assembly, a second suction cup assembly, at least one third suction cup assembly, a telescopic connecting rod assembly and a pitch changing driving assembly. The first suction cup assembly is fixedly connected to the base. The second suction cup assembly is slidably connected to the base. The at least one third suction cup assembly is slidably connected to the base; the telescopic connecting rod assembly is connected to the first suction cup assembly, the second suction cup assembly and the third suction cup assembly. The variable-pitch driving assembly is in driving connection with the second suction cup assembly so that the third suction cup assembly can be driven by the telescopic connecting rod assembly to be close to or away from the first suction cup assembly along with the second suction cup assembly. The distance changing device disclosed by the utility model solves the problems that the distance among a plurality of suction cups cannot be adjusted, so that the distance changing device cannot be compatible with the glue taking of adhesive paper with different lengths, further cannot be adaptive to the glue wrapping of battery bus trays with different specifications, and is low in compatibility.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a 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, wrapping a battery busbar with adhesive requires unwinding the tape, followed by a press and remover that works together to press the tape, which is then cut into multiple sections by a cutter. Finally, the adhesive removal device's multiple suction cups grasp the tape one by one to complete the removal process. Battery busbars typically vary in size, requiring varying lengths of adhesive tape. However, the spacing between the multiple suction cups in existing adhesive removal devices cannot be adjusted to accommodate tapes of varying lengths, making them incompatible with battery busbar wrapping of varying sizes.

[0004] Therefore, in order to solve the above technical problems, it is urgent to develop a variable-distance glue-taking device. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a variable distance device, which solves the problem that the spacing between multiple suction cups cannot be adjusted, and thus cannot be compatible with the removal of adhesive tapes of different lengths, and further cannot be adapted to the adhesive wrapping of battery busbars of different specifications, resulting in low compatibility.

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

[0007] The utility model provides a pitch-changing device, comprising:

[0008] base;

[0009] a first suction cup assembly, fixedly connected to the base;

[0010] a second suction cup assembly, slidably connected to the base;

[0011] at least one third suction cup assembly slidably connected to the base;

[0012] a telescopic link assembly connected to the first suction cup assembly, the second suction cup assembly, and the third suction cup assembly, the telescopic link assembly comprising a first connection point connected to the first suction cup assembly, and a plurality of second connection points respectively connected to the second suction cup assembly or the third suction cup assembly; the plurality of second connection points being arranged to move in conjunction with the first connection point; and

[0013] The variable pitch drive assembly is driven and connected to the second suction cup assembly so that the third suction cup assembly is driven by the telescopic link assembly and moves closer to or away from the first suction cup assembly along with the second suction cup assembly.

[0014] In some implementations, the telescopic link assembly further includes a plurality of short link arms and long link arms; the plurality of long link arms are hinged end to end in sequence to form a long link arm group, and the short link arms are hinged to both ends of the long link arm group;

[0015] The first connection point and / or the second connection point are formed at the middle section of the long arm of the connecting rod or the free end of the short arm of the connecting rod; the first connection point is hinged to the first suction cup assembly, and the second connection point is hinged to the second suction cup assembly or the third suction cup assembly.

[0016] In this implementation, the telescopic link assembly is hinged to the first suction cup assembly, the second suction cup assembly and the third suction cup assembly respectively, ensuring the reliability of the telescopic link assembly driving the second suction cup assembly and the third suction cup assembly to synchronously approach or move away from the first suction cup assembly when the telescopic link assembly is extended or retracted.

[0017] In some implementations, a first limiting assembly and a second limiting assembly are provided on the base, and the first limiting assembly and the second limiting assembly are respectively arranged on opposite sides of the second suction cup assembly along the movable path of the second suction cup assembly; the second suction cup assembly is provided with a third limiting assembly, and the third limiting assembly is located between the first limiting assembly and the second limiting assembly.

[0018] In this implementation, the first limiting assembly and the second limiting assembly limit the sliding distance of the second suction cup assembly to control the distance between the second suction cup assembly and the third suction cup assembly approaching or moving away from the first suction cup assembly.

[0019] In some implementations, the first limiting assembly and / or the second limiting assembly includes a limiting seat and a limiting screw, the limiting seat is provided with a threaded hole, and the limiting screw is screwed into the threaded hole.

[0020] In this implementation, by adjusting the connection position of the limiting screw and the limiting seat, the limiting effect of the first limiting assembly and / or the second limiting assembly on the sliding distance of the second suction cup assembly can be adjusted.

[0021] In some implementations, the variable pitch drive assembly includes a variable pitch cylinder and a variable pitch piston rod, and both ends of the variable pitch piston rod are respectively connected to the variable pitch cylinder and the third limiting assembly.

[0022] In some implementations, a positioning mechanism is further included, which includes a positioning card plate and a positioning drive assembly. The positioning card plate is slidably connected to the base, and the positioning card plate is provided with a positioning structure. The positioning drive assembly drives the positioning card plate to move closer to or away from the first suction cup assembly, the second suction cup assembly, and the third suction cup assembly, so that the positioning structure is fixedly engaged with or away from the first suction cup assembly, the second suction cup assembly, and the third suction cup assembly.

[0023] In this implementation, the positioning structure is clamped to the multiple suction cup assemblies to prevent the multiple suction cup assemblies from moving, thereby ensuring the reliability of the multiple suction cup assemblies in taking and delivering glue.

[0024] In some implementations, the first suction cup assembly, the second suction cup assembly, and the third suction cup assembly are respectively provided with a follower, and the positioning structure includes a first limiting groove group so that when the telescopic link assembly is extended, the first limiting groove group is clamped to the follower.

[0025] In some implementations, the positioning structure further includes a second limiting groove group, so that when the telescopic link assembly is retracted, the second limiting groove group is engaged with the follower.

[0026] In some implementations, the positioning drive assembly includes a positioning cylinder and a positioning piston rod, and both ends of the positioning piston rod are respectively connected to the positioning cylinder and the positioning clamping plate.

[0027] In some implementations, the base is provided with a first slide rail, and the second suction cup assembly and the third suction cup assembly are provided with a first slider slidably connected to the first slide rail; and / or

[0028] The base is provided with a second slide rail, and the positioning clamping plate is provided with a second sliding block slidably connected to the second slide rail.

[0029] In summary, the present invention has at least the following advantages:

[0030] The variable distance device provided by the utility model has a first suction cup assembly, a second suction cup assembly and a third suction cup assembly connected together by a telescopic connecting rod assembly, and the first suction cup assembly is fixedly connected to the base. When the second suction cup assembly is driven to approach or move away from the first suction cup assembly by the variable distance driving assembly, the telescopic connecting rod assembly drives at least one third suction cup assembly to move synchronously with the second suction cup assembly to approach or move away from the first suction cup assembly, so that the multiple suction cup assemblies are equidistantly variable in distance. By adjusting the telescopic distance of the telescopic connecting rod assembly, the spacing between the multiple suction cup assemblies is adjusted, which solves the problem that the spacing between the multiple suction cups cannot be adjusted, and thus it is incompatible with the glue removal of different lengths of adhesive tape, and further it is incompatible with the glue wrapping of battery busbars of different specifications, and the compatibility is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of the pitch-changing device of Example 1;

[0032] Figure 2 for Figure 1 A schematic structural diagram of the telescopic link assembly shown;

[0033] Figure 3 Schematic diagram of the structure of the pitch-changing device of Example 2;

[0034] Figure 4 Schematic diagram of the structure of the pitch-changing device of Example 3;

[0035] Figure 5 for Figure 4 The structural diagram of the positioning mechanism is shown.

[0036] Markings in the figure:

[0037] 1. Base; 11. First limiting assembly; 111. Limiting seat; 112. Limiting screw; 12. Second limiting assembly;

[0038] 2. First suction cup assembly; 21. Follower;

[0039] 3. Second suction cup assembly; 31. Third limiting assembly; 32. First slider;

[0040] 4. The third suction cup assembly;

[0041] 5. Telescopic connecting rod assembly; 51. First connection point; 52. Second connection point; 53. Short connecting rod arm; 54. Long connecting rod arm;

[0042] 6. Pitch-variable drive assembly; 61. Pitch-variable cylinder; 62. Pitch-variable piston rod;

[0043] 7. Positioning mechanism; 71. Positioning card; 711. Positioning structure; 7111. First limiting groove group; 7112. Second limiting groove group; 712. Second slider; 72. Positioning drive assembly; 721. Positioning cylinder; 722. Positioning piston rod;

[0044] 8. First slide rail;

[0045] 9. Second slide rail. DETAILED DESCRIPTION

[0046] 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.

[0047] 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.

[0048] Example 1:

[0049] Please see the attached Figure 1 ~Attached Figure 2 The variable distance device of the present invention includes a base 1, a first suction cup assembly 2, a second suction cup assembly 3, at least one third suction cup assembly 4, a telescopic connecting rod assembly 5 and a variable distance drive assembly 6.

[0050] Among them, see Figure 1 , Figure 1 The diagram illustrates the structural relationship between multiple suction cup assemblies and the telescopic link assembly 5 in an embodiment of the present invention. Specifically, the first suction cup assembly 2 is fixedly connected to the base 1; the second suction cup assembly 3 is slidably connected to the base 1; at least one third suction cup assembly 4 is slidably connected to the base 1; the telescopic link assembly 5 is connected to the first suction cup assembly 2, the second suction cup assembly 3, and the third suction cup assembly 4. The telescopic link assembly 5 includes a first connection point 51 connected to the first suction cup assembly 2, and multiple second connection points 52 respectively connected to the second suction cup assembly 3 or the third suction cup assembly 4; the multiple second connection points 52 are arranged to move in linkage with the first connection point 51; the variable pitch drive assembly 6 is drivably connected to the second suction cup assembly 3, so that the third suction cup assembly 4 moves closer to or away from the first suction cup assembly 2 under the drive of the telescopic link assembly 5 along with the second suction cup assembly 3.

[0051] In this embodiment, the first suction cup assembly 2, the second suction cup assembly 3, and at least one third suction cup assembly 4 are connected to the base 1 in parallel and are connected together by a telescopic link assembly 5. Specifically, the first suction cup assembly 2 is fixedly connected to the base 1, while the second suction cup assembly 3 and at least one third suction cup assembly 4 are slidably connected to the base 1. The telescopic link assembly 5 is connected to the first suction cup assembly 2 via a first connection point 51, and multiple second connection points 52 are respectively connected to the second suction cup assembly 3 or the third suction cup assembly 4 to ensure the stability of the connection between the telescopic link assembly 5 and the first suction cup assembly 2, the second suction cup assembly 3, and the third suction cup assembly 4. In this way, when the variable pitch drive assembly 6 drives the second suction cup assembly 3 to slide along the base 1, the third suction cup assembly 4 will, under the transmission of the telescopic link assembly 5, move closer to or farther away from the first suction cup assembly 2 synchronously with the second suction cup assembly 3, that is, the first suction cup assembly 2, the second suction cup assembly 3, and the at least one third suction cup assembly 4 will be pulled equidistantly apart. By adjusting the telescopic distance of the telescopic link assembly 5, and thereby adjusting the spacing between the multiple suction cup assemblies, the suction cup assembly can absorb adhesive tapes of different lengths, thereby adapting to more battery bus wrappings of different specifications.

[0052] It can be understood that the first suction cup assembly 2 can be arranged between the second suction cup assembly 3 and the third suction cup assembly 4, or the first suction cup assembly 2, the second suction cup assembly 3 and the third suction cup assembly 4 can be arranged in sequence on the base 1. It only needs to ensure that one of the suction cup assemblies is fixedly connected to the base 1. The remaining suction cup assemblies slidably connected to the base 1 can be driven by the telescopic connecting rod assembly 5 to cause the suction cup assemblies to be equidistantly changed in distance relative to the suction cup assembly fixedly connected to the base 1.

[0053] The above-mentioned variable distance device, since the first suction cup assembly 2, the second suction cup assembly 3 and the third suction cup assembly 4 are connected together by the telescopic connecting rod assembly 5, and the first suction cup assembly 2 is fixedly connected to the base 1, when the second suction cup assembly 3 is driven close to or away from the first suction cup assembly 2 by the variable distance driving assembly 6, the telescopic connecting rod assembly 5 drives at least one third suction cup assembly 4 to synchronously approach or move away from the first suction cup assembly 2 with the second suction cup assembly 3, so that the multiple suction cup assemblies undergo equidistant distance variation; by adjusting the telescopic distance of the telescopic connecting rod assembly 5, the spacing between the multiple suction cup assemblies is adjusted, which solves the problem that the spacing between the multiple suction cups cannot be adjusted, and thus it is incompatible with the glue removal of different lengths of adhesive tape, and further it is incompatible with the glue wrapping of battery busbars of different specifications, and the compatibility is low.

[0054] In some preferred embodiments, see Figure 2 , Figure 2The diagram illustrates the specific structure of the telescopic link assembly 5 in an embodiment of the present invention. Specifically, the telescopic link assembly 5 includes a plurality of short link arms 53 and long link arms 54. The plurality of long link arms 54 are hinged end-to-end to form a group of long link arms 54, with the short link arms 53 hinged to the ends of the group of long link arms 54. A first connection point 51 and / or a second connection point 52 are formed at the middle section of the long link arms 54 or the free ends of the short link arms 53. The first connection point 51 is hinged to the first suction cup assembly 2, and the second connection point 52 is hinged to the second suction cup assembly 3 or the third suction cup assembly 4. This ensures that the telescopic link assembly 5 is hinged to the first suction cup assembly 2, the second suction cup assembly 3, and the third suction cup assembly 4, respectively, ensuring that the second and third suction cup assemblies 3 and 4 move synchronously toward or away from the first suction cup assembly 2 when the telescopic link assembly 5 is extended or retracted. Preferably, the telescopic link assembly 5 is a scissor-type link assembly to increase the pulling force generated when driving the second suction cup assembly 3 and the third suction cup assembly 4 toward or away from the first suction cup assembly 2, and is more balanced and stable, further improving the stability of the overall structure.

[0055] Example 2:

[0056] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the structure of the pitch-changing device of the utility model. Figure 3 , Figure 3 The diagram shows the structural relationship between the first limiting assembly 11 , the second limiting assembly 12 and the second suction cup assembly 3 in the embodiment of the present invention.

[0057] Among them, the base 1 is provided with a first limiting component 11 and a second limiting component 12, and the first limiting component 11 and the second limiting component 12 are respectively arranged on the opposite sides of the second suction cup component 3 along the movable path of the second suction cup component 3; the second suction cup component 3 is provided with a third limiting component 31, and the third limiting component 31 is located between the first limiting component 11 and the second limiting component 12.

[0058] In this embodiment, the variable distance drive assembly 6 drives the second suction cup assembly 3 to approach or move away from the first suction cup assembly 2. When the second suction cup assembly 3 moves away from the first suction cup assembly 2, at least one third suction cup assembly 4 follows the second suction cup assembly 3 to change distance at equal intervals until the third limiting assembly 31 of the second suction cup assembly 3 abuts the first limiting assembly 11. The variable distance drive assembly 6 cuts off the power output to stop the second suction cup assembly 3 from sliding, thereby limiting the sliding position of the second suction cup assembly 3. When the second suction cup assembly 3 approaches the first suction cup assembly 2 until the third limiting assembly 31 abuts the second limiting assembly 12, the variable distance drive assembly 6 cuts off the power output to stop the second suction cup assembly 3 from sliding. At this time, the multiple suction cup assemblies are retracted together. The first limiting assembly 11 and the second limiting assembly 12 avoid the problem of multiple suction cup assemblies colliding with each other or the telescopic link assembly 5 being damaged due to excessive extension, thereby extending the service life of the overall structure.

[0059] In some preferred embodiments, the first limiting assembly 11 and / or the second limiting assembly 12 includes a limiting seat 111 and a limiting screw 112. The limiting seat 111 defines a threaded hole, and the limiting screw 112 is screwed into the threaded hole. By adjusting the connection position of the limiting screw 112 and the limiting seat 111, the sliding distance of the second suction cup assembly 3 by the first limiting assembly 11 and / or the second limiting assembly 12 can be adjusted, thereby adjusting the variable distance between the multiple suction cup assemblies, so that the multiple suction cup assemblies can achieve a quick switching distance to achieve the effect of adapting to different lengths of tape.

[0060] In some more preferred embodiments, the variable pitch drive assembly 6 includes a variable pitch cylinder 61 and a variable pitch piston rod 62, with both ends of the variable pitch piston rod 62 respectively connected to the variable pitch cylinder 61 and the third position-limiting assembly 31. The variable pitch cylinder 61 drives the variable pitch piston rod 62 to extend and retract, thereby driving the third position-limiting assembly 31 to move relative to the variable pitch cylinder 61, thereby driving the second suction cup assembly 3 toward or away from the first suction cup assembly 2.

[0061] Example 3:

[0062] The difference between this embodiment and embodiment 2 is that this embodiment further optimizes the structure of the variable pitch device of the utility model. Figure 4 ~Attached Figure 5 .

[0063] Among them, see Figure 4 , Figure 4The diagram illustrates the structural relationship between the positioning plate 71 and the plurality of suction cup assemblies in an embodiment of the present invention. Specifically, the pitch-changing device further includes a positioning mechanism 7, which includes a positioning plate 71 and a positioning drive assembly 72. The positioning plate 71 is slidably connected to the base 1 and is provided with a positioning structure 711. The positioning drive assembly 72 drives the positioning plate 71 toward or away from the first suction cup assembly 2, the second suction cup assembly 3, and the third suction cup assembly 4, so that the positioning structure 711 is fixedly engaged with or away from the first suction cup assembly 2, the second suction cup assembly 3, and the third suction cup assembly 4.

[0064] In this embodiment, when the multiple suction cup assemblies change their distance, the positioning drive assembly 72 drives the positioning clamp 71 to approach the multiple suction cup assemblies, and is clamped to the multiple suction cup assemblies through the positioning structure 711, so that the multiple suction cup assemblies after the distance change maintain the distance change state, thereby improving the structural stability and avoiding the rotation of the telescopic link assembly 5 causing the multiple suction cup assemblies to retract, thereby causing the problem of sticking between multiple sheets of adhesive tape; and after the adhesive tape feeding is completed, the positioning drive assembly 72 drives the positioning clamp 71 away from the multiple suction cup assemblies to release the clamping state between the positioning structure 711 and the multiple suction cup assemblies. After the clamping restriction is released, the multiple suction cup assemblies can be retracted together under the drive of the distance change drive assembly 6.

[0065] In some preferred embodiments, please continue to see Figure 4 , Figure 4 The diagram illustrates the structural relationship between the first limiting groove group 7111 and the follower 21 when the telescopic link assembly 5 is extended in an embodiment of the present invention. Specifically, the first suction cup assembly 2, the second suction cup assembly 3, and the third suction cup assembly 4 are each provided with a follower 21, and the positioning structure 711 includes a first limiting groove group 7111, so that when the telescopic link assembly 5 is extended, the first limiting groove group 7111 engages with the follower 21. The telescopic link assembly 5 extends, thereby driving the second suction cup assembly 3 and the third suction cup assembly 4 to synchronously move away from the first suction cup assembly 2. After the multiple suction cup assemblies change distance, the first limiting groove group 7111 respectively engages with the multiple followers 21, so that the multiple suction cup assemblies maintain the changed distance state and do not easily retract. After the multiple suction cup assemblies complete the glue feeding action, the positioning clamp 71 moves away from the multiple suction cup assemblies, so that the first limiting groove group 7111 releases the engagement state with the multiple followers 21.

[0066] In some preferred embodiments, see Figure 5 , Figure 5The diagram illustrates the structural relationship between the second limiting groove group 7112 and the follower 21 when the telescopic link assembly 5 contracts in an embodiment of the present invention. Specifically, the positioning structure 711 also includes a second limiting groove group 7112, so that when the telescopic link assembly 5 contracts, the second limiting groove group 7112 is engaged with the follower 21. The telescopic link assembly 5 contracts, thereby driving the second suction cup assembly 3 and the third suction cup assembly 4 to synchronously approach the first suction cup assembly 2. The multiple suction cup assemblies are in a retracted state. The positioning clamping plate 71, driven by the positioning drive assembly 72, approaches the multiple suction cup assemblies, so that the second limiting groove group 7112 is respectively engaged with the multiple followers 21, thereby improving the compactness of the overall structure and ensuring that the multiple suction cup assemblies do not move when taking glue, thereby improving the reliability of the overall structure.

[0067] In some preferred embodiments, the positioning drive assembly 72 includes a positioning cylinder 721 and a positioning piston rod 722, with both ends of the positioning piston rod 722 respectively connected to the positioning cylinder 721 and the positioning clamping plate 71. The positioning cylinder 721 drives the positioning piston rod 722 to extend and retract, thereby driving the positioning clamping plate 71 to move relative to the positioning cylinder 721, thereby driving the positioning clamping plate 71 to move closer to or away from the multiple suction cup assemblies.

[0068] In some more preferred embodiments, a first slide rail 8 is provided on the base 1, and the second suction cup assembly 3 and the third suction cup assembly 4 are provided with a first slider 32 slidably connected to the first slide rail 8; and / or a second slide rail 9 is provided on the base 1, and the positioning clamp 71 is provided with a second slider 712 slidably connected to the second slide rail 9. The first slider 32 is slidably connected to the first slide rail 8 to enable the second suction cup assembly 3 and the third suction cup assembly 4 to slide smoothly relative to the base 1, thereby ensuring the sliding stability between the second suction cup assembly 3 and the third suction cup assembly 4 and the base 1 respectively; the second slider 712 is slidably connected to the second slide rail 9 to enable the positioning clamp 71 to slide smoothly relative to the base 1, thereby ensuring that the first limiting groove group 7111 and the second limiting groove group 7112 are more smoothly and stably connected to the multiple followers 21.

[0069] The variable distance device of the present invention is as follows: since the first suction cup assembly 2, the second suction cup assembly 3 and the third suction cup assembly 4 are connected together by the telescopic connecting rod assembly 5, and the first suction cup assembly 2 is fixedly connected to the base 1, when the second suction cup assembly 3 is driven to approach or move away from the first suction cup assembly 2 by the variable distance driving assembly 6, the telescopic connecting rod assembly 5 drives at least one third suction cup assembly 4 to synchronously approach or move away from the first suction cup assembly 2 with the second suction cup assembly 3, so that the multiple suction cup assemblies are equidistantly variable in distance; by adjusting the telescopic distance of the telescopic connecting rod assembly 5, the spacing between the multiple suction cup assemblies is adjusted, which solves the problem that the spacing between the multiple suction cups cannot be adjusted, and thus it is incompatible with the glue removal of different lengths of adhesive tape, and further it is incompatible with the glue wrapping of battery busbars of different specifications, and the compatibility is low.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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 pitch-changing device, characterized in that: include: Base (1); A first suction cup assembly (2) fixedly connected to the base (1); A second suction cup assembly (3) slidably connected to the base (1); At least one third suction cup assembly (4) slidably connected to the base (1); a telescopic connecting rod assembly (5) connected to the first suction cup assembly (2), the second suction cup assembly (3) and the third suction cup assembly (4); the telescopic connecting rod assembly (5) comprises a first connection point (51) connected to the first suction cup assembly (2), and a plurality of second connection points (52) respectively connected to the second suction cup assembly (3) or the third suction cup assembly (4); the plurality of second connection points (52) are arranged to move in conjunction with the first connection point (51); and A variable pitch drive assembly (6) is drivingly connected to the second suction cup assembly (3) so that the third suction cup assembly (4) moves closer to or farther away from the first suction cup assembly (2) along with the second suction cup assembly (3) under the drive of the telescopic connecting rod assembly (5).

2. The pitch-changing device according to claim 1, characterized in that: The telescopic connecting rod assembly (5) further comprises a plurality of connecting rod short arms (53) and connecting rod long arms (54); the plurality of connecting rod long arms (54) are hinged end to end in sequence to form a connecting rod long arm group, and the connecting rod short arms (53) are hinged to both ends of the connecting rod long arm (54) group; The first connection point (51) and / or the second connection point (52) are formed at the middle section of the long connecting rod arm (54) or the free end of the short connecting rod arm (53); the first connection point (51) is hinged to the first suction cup assembly (2), and the second connection point (52) is hinged to the second suction cup assembly (3) or the third suction cup assembly (4).

3. The pitch-changing device according to claim 1, characterized in that: The base (1) is provided with a first limiting component (11) and a second limiting component (12), and the first limiting component (11) and the second limiting component (12) are respectively arranged on opposite sides of the second suction cup component (3) along the movable path of the second suction cup component (3); the second suction cup component (3) is provided with a third limiting component (31), and the third limiting component (31) is located between the first limiting component (11) and the second limiting component (12).

4. The pitch-changing device according to claim 3, characterized in that: The first limiting assembly (11) and / or the second limiting assembly (12) comprises a limiting seat (111) and a limiting screw (112); the limiting seat (111) is provided with a threaded hole, and the limiting screw (112) is screwed into the threaded hole.

5. The pitch-changing device according to claim 3, characterized in that: The variable pitch drive assembly (6) comprises a variable pitch cylinder (61) and a variable pitch piston rod (62), and two ends of the variable pitch piston rod (62) are respectively connected to the variable pitch cylinder (61) and the third position limiting assembly (31).

6. The pitch-changing device according to claim 1, characterized in that: The invention also includes a positioning mechanism (7), wherein the positioning mechanism (7) includes a positioning card plate (71) and a positioning drive assembly (72), wherein the positioning card plate (71) is slidably connected to the base (1), and the positioning card plate (71) is provided with a positioning structure (711), and the positioning drive assembly (72) drives the positioning card plate (71) to approach or move away from the first suction cup assembly (2), the second suction cup assembly (3) and the third suction cup assembly (4), so that the positioning structure (711) is fixedly engaged with or moves away from the first suction cup assembly (2), the second suction cup assembly (3) and the third suction cup assembly (4).

7. The pitch-changing device according to claim 6, characterized in that: The first suction cup assembly (2), the second suction cup assembly (3) and the third suction cup assembly (4) are respectively provided with a follower (21), and the positioning structure (711) comprises a first limiting groove group (7111) so that when the telescopic connecting rod assembly (5) is extended, the first limiting groove group (7111) is engaged with the follower (21).

8. The pitch-changing device according to claim 7, characterized in that: The positioning structure (711) further comprises a second limiting groove group (7112), so that when the telescopic connecting rod assembly (5) contracts, the second limiting groove group (7112) is engaged with the follower (21).

9. The pitch-changing device according to claim 6, characterized in that: The positioning drive assembly (72) comprises a positioning cylinder (721) and a positioning piston rod (722), and two ends of the positioning piston rod (722) are respectively connected to the positioning cylinder (721) and the positioning clamping plate (71).

10. The pitch-changing device according to claim 6, characterized in that: The base (1) is provided with a first slide rail (8), and the second suction cup assembly (3) and the third suction cup assembly (4) are provided with a first slider (32) slidably connected to the first slide rail (8); and / or The base (1) is provided with a second slide rail (9), and the positioning clamping plate (71) is provided with a second sliding block (712) slidably connected to the second slide rail (9).

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