A material variable pitch mechanism

Abstract

The utility model relates to the field of sanitary product production equipment, concretely relates to a material variable distance mechanism, solved the problem that the adjustable range of the variable distance equipment used at present is smaller, including frame, define the initial input direction of material as X, the height direction is Z, perpendicular to X, the direction of Z is Y, the mounting support that extends along Y is arranged on the frame, two groups of adjustment seat are arranged on the mounting support, and the steering rod is installed on each group of adjustment seat, the steering rod on two groups of adjustment seat is parallel to each other, and the Z height of two steering rods is not same, and the angle with X, Y is 45 degrees. The utility model is applied to the variable distance adjustment of material delivery.

Description

Technical Field

[0001] This utility model relates to the field of sanitary product production equipment, specifically to a material pitch-changing mechanism. Background Technology

[0002] In the production of disposable hygiene products, different widths of materials are usually required for production depending on the product model. For different positions of the sheet, the distance between materials on different sides of the same part needs to be changed. For example, the leak-proof non-woven fabric on both sides is usually made by cutting a single piece of non-woven fabric in the middle, changing the distance, and then laminating it to the required position of the product. Current pitch-changing devices, such as the applicant's prior application CN 205795907 U, propose a pitch-changing device for non-woven fabric with two-sided anti-leakage, including a frame with an upwardly protruding step. The frame is provided with a first rotating seat, and the front and rear ends of the first rotating seat are respectively provided with first transmission rollers. The step is provided with a second rotating seat, and the front and rear ends of the second rotating seat are respectively provided with second transmission rollers. The upper surface of the first transmission roller is lower than the horizontal plane of the step. The first rotating seat is provided with two concentric first arc-shaped grooves, and the second rotating seat is provided with two concentric second arc-shaped grooves. The first arc-shaped grooves are fastened to the frame by first fastening screws passing through the first arc-shaped grooves, and the second arc-shaped grooves are fastened to the step by second fastening screws passing through the second arc-shaped grooves.

[0003] However, this type of variable pitch material requires lengthening the entire device to adjust the variable pitch size in order to achieve a gradual and stable pitch change effect. Furthermore, the space for adjusting the distance is limited, making it impossible to adjust the distance over a large range in a small space as needed. Summary of the Invention

[0004] Therefore, this utility model provides a material pitch-changing mechanism, which solves the problem of the small adjustable range of the pitch-changing equipment currently in use.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: A material pitch-changing mechanism includes a frame, defining the initial input direction of the material as the X-direction, the height direction as the Z-direction, and the direction perpendicular to the X and Z directions as the Y-direction. The frame is provided with mounting brackets extending along the Y-direction, and the mounting brackets are provided with two sets of adjustment seats. Each set of adjustment seats is equipped with a steering rod. The steering rods on the two sets of adjustment seats are parallel to each other, and the Z-direction heights of the two steering rods are different, and the angle between them and the X and Y directions is 45°.

[0006] Preferably, the steering rod has a rotatable mounting structure.

[0007] Preferably, the steering rod is a fixed installation structure that cannot be rotated.

[0008] Preferably, a first pitch-changing mechanism and a second pitch-changing mechanism are sequentially arranged on the frame along the X direction, and the angle between the steering rod on the first pitch-changing mechanism and the steering rod on the second pitch-changing mechanism is 90°.

[0009] A material pitch-changing mechanism includes a frame, defining the initial input direction of the material as the X-direction, the height direction as the Z-direction, and the direction perpendicular to the X and Z directions as the Y-direction. The frame is provided with mounting brackets extending along the Y-direction, and the mounting brackets are provided with two sets of adjustment seats. An input steering rod and an output steering rod are respectively mounted on the two sets of adjustment seats. The Z-direction heights of the input steering rod and the output steering rod are different. The angle between the output steering rod and the X and Y directions is 45°, and the angle between the input steering rod and the X and Y directions is 45°±3°.

[0010] By adopting the aforementioned technical solution, the beneficial effects of this utility model are: This technical solution utilizes the Z-axis height difference and 45° angle design of two sets of steering rods to achieve material displacement in the Y-axis while maintaining linear output in the X-axis. This overcomes the site limitations of traditional single-rod variable-pitch designs, enabling a wide range of Y-axis adjustments within a small space. The adjustment space is more than three times larger than conventional mechanisms, resulting in highly efficient space utilization. The parallel and fixed-angle design of the two rods ensures a stable, zigzag material transport path, reducing the risk of deviation and ensuring high structural stability. The Z-axis height difference design is suitable for materials of different thicknesses, preventing friction damage between the material and the rods. At the same time, the 45° angle ensures uniform stress on the material, reducing transport resistance. Attached Figure Description

[0011] Figure 1 This is a top view structural diagram of the mechanism in Embodiment 1 of this utility model.

[0012] Figure 2 This is a schematic diagram of the structure of the mechanism in Embodiment 1 of this utility model from the left view.

[0013] Figure 3 This is a schematic diagram of the application structure of the mechanism in Embodiment 1 of this utility model.

[0014] Figure 4 This is a top view structural diagram of the mechanism in Embodiment 1 of this utility model.

[0015] Reference numerals: 100, frame; 100a, first pitch control mechanism; 100b, second pitch control mechanism; 1, mounting bracket; 2, adjusting seat; 3, steering rod; 3a, input steering rod; 3b, output steering rod; a, left stock; b, right stock. Detailed Implementation

[0016] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. Example 1

[0017] refer to Figure 1 and Figure 2 A material pitch-changing mechanism includes a frame 100. The initial input direction of the material is defined as the X-direction, the height direction as the Z-direction, and the direction perpendicular to the X-direction and the Z-direction as the Y-direction. The frame 100 is provided with a mounting bracket 1 extending along the Y-direction. The mounting bracket 1 is provided with two sets of adjustment seats 2. Each set of adjustment seats 2 is equipped with a steering rod 3. The steering rods 3 on the two sets of adjustment seats 2 are parallel to each other. The Z-direction heights of the two steering rods 3 are different, and the angle α between them and the X-direction and the Y-direction is 45°. This technical solution utilizes the Z-axis height difference and 45° angle design of two sets of steering rods 3 to achieve material displacement in the Y-axis while maintaining linear output in the X-axis. This overcomes the site limitations of traditional single-rod variable-pitch designs, enabling a wide range of Y-axis adjustments within a small space. The adjustment space is more than three times larger than that of conventional mechanisms, resulting in highly efficient space utilization. The parallel and fixed-angle design of the two rods ensures a stable, zigzag material transport path, reducing the risk of deviation and ensuring high structural stability. The Z-axis height difference design is suitable for materials of different thicknesses, preventing friction damage between the material and the rods. At the same time, the 45° angle ensures uniform force on the material, reducing transport resistance.

[0018] Structurally, different installation methods for the steering rod 3 can be designed depending on the material used. ① The steering rod 3 is a rotatable mounting structure. For materials with high coefficient of friction (such as rubber and soft PVC), the rotating structure can reduce conveying resistance and avoid scratches on the material surface; for highly elastic materials (such as silicone strips), the rotating rod can adapt to material deformation and maintain conveying stability. Furthermore, due to the height difference design of the two sets of steering rods 3 in the Z direction, the rotating structure can further reduce stress concentration during the adjustment process and extend the equipment life.

[0019] ② The steering rod 3 is a fixed, non-rotatable installation structure. It is suitable for low-elasticity, high-rigidity materials (such as metal strips and hard plastics). The fixed structure can provide stronger support and avoid shaking or deviation during material transportation.

[0020] In practical applications, such as Figure 3As shown, a first pitch-changing mechanism 100a and a second pitch-changing mechanism 100b are sequentially arranged along the X-direction on the frame 100. The angle between the steering rod 3 on the first pitch-changing mechanism 100a and the steering rod 3 on the second pitch-changing mechanism 100b is 90°. Specifically, this mechanism adapts to the bidirectional pitch-changing requirements after material cutting: wide materials are cut into two strands (left strand a, right strand b) along the centerline, and adjusted to both sides in the Y-direction (e.g., left strand a +30mm, right strand b -30mm) to achieve symmetrical cutting and conveying. The 90° angle design ensures that the conveying paths of the two strands are perpendicular, avoiding mutual interference; the independent adjustment of the two strands after cutting meets the requirements of complex processes. Example 2

[0021] refer to Figure 4 Compared to Embodiment 1, the mounting bracket 1 of the material pitch-changing mechanism is equipped with two sets of adjustment seats 2. An input steering rod 3a and an output steering rod 3b are respectively mounted on the two sets of adjustment seats 2. The Z-direction heights of the input steering rod 3a and the output steering rod 3b are different. The output steering rod 3b forms a 45° angle with the X and Y directions (α), while the input steering rod 3a forms a 45°±3° angle with either the X or Y direction (γ). This design allows for a ±3° deviation in the initial material input direction (e.g., material offset due to errors in previous processes). Fine-tuning the input rod angle enables "soft landing" conveying, avoiding material damage caused by hard correction. The angle fine-tuning function, combined with the Z-direction height difference of the steering rods 3a, can adapt to non-standard materials, improving the equipment's compatibility with special materials.

[0022] In summary, this technical solution possesses the core advantages of large-scale pitch variation in small spaces, structural stability, and smooth adjustment; and through different arrangements of the steering rod 3, angle fine-tuning, and dual-mechanism collaboration, it further enhances the applicability, precision, and flexibility of the equipment, forming a complete material pitch variation solution.

[0023] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A material pitch-changing mechanism, comprising a frame (100), defining the initial input direction of the material as the X-direction, the height direction as the Z-direction, and the direction perpendicular to the X-direction and the Z-direction as the Y-direction, characterized in that: The frame (100) is provided with a mounting bracket (1) extending along the Y direction. The mounting bracket (1) is provided with two sets of adjustment seats (2). Each set of adjustment seats (2) is equipped with a steering rod (3). The steering rods (3) on the two sets of adjustment seats (2) are parallel to each other. The Z-direction heights of the two steering rods (3) are different, and the angle between them and the X and Y directions is 45°.

2. The material pitch-changing mechanism according to claim 1, characterized in that: The steering rod (3) is a rotatable mounting structure.

3. The material pitch-changing mechanism according to claim 1, characterized in that: The steering rod (3) is a fixed installation structure that cannot be rotated.

4. The material pitch-changing mechanism according to claim 1, characterized in that: The frame (100) is provided with a first pitch mechanism (100a) and a second pitch mechanism (100b) arranged sequentially along the X direction. The angle between the steering rod (3) on the first pitch mechanism (100a) and the steering rod (3) on the second pitch mechanism (100b) is 90°.

5. A material pitch-changing mechanism, comprising a frame (100), defining the initial input direction of the material as the X-direction, the height direction as the Z-direction, and the direction perpendicular to the X-direction and the Z-direction as the Y-direction, characterized in that: The frame (100) is provided with a mounting bracket (1) extending along the Y direction. The mounting bracket (1) is provided with two sets of adjustment seats (2). The two sets of adjustment seats (2) are respectively equipped with an input steering rod (3a) and an output steering rod (3b). The Z-direction heights of the input steering rod (3a) and the output steering rod (3b) are different. The angle between the output steering rod (3b) and the X and Y directions is 45°. The angle between the input steering rod (3a) and the X and Y directions is 45°±3°.

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