Saw blade connecting structure of sawtooth roller

Abstract

The utility model belongs to the sawtooth roller gill box part field, concretely relates to a sawtooth roller gill box partition saw blade connecting structure, solves the problem of difficult saw blade replacement, easy damage and large vibration and noise when high speed rotating in prior art. It includes distributed saw blade structure design, positioning ring and positioning groove cooperation optimization, reinforcing rib structure refinement, bolt selection and layout optimization, anti-loose design, auxiliary connecting structure and dynamic balance compensation block design. By dividing the circular saw blade into three sector areas along the circumferential direction evenly, and optimizing the quality distribution and connecting mode, the processing effect, stability and maintenance convenience of the saw blade are significantly improved. The utility model can effectively reduce the unbalance amount when the saw blade rotates at high speed, reduce vibration and noise, prolong the service life, and is suitable for efficient and stable operation of the sawtooth roller gill box.

Description

Technical Field

[0001] This utility model relates to the technical field of saw toothed cotton ginning machine components, specifically to the partition saw blade connection structure of the saw toothed cotton ginning machine. Background Technology

[0002] Currently, the saw gin is a crucial piece of equipment in the cotton processing field, and the performance of its core component, the saw blade, directly affects the processing quality and efficiency of seed cotton. The design and connection structure of the saw blade play a vital role in practical applications. However, existing saw blades in saw gins typically employ an integral design, with the saw blade and positioning ring intermittently mounted on the same shaft. Over long-term use, the teeth in the middle section of the saw blade are prone to damage. Because the saw blade is a single unit, any partial damage requires replacing the entire blade, which not only increases maintenance costs but also reduces equipment operating efficiency. Furthermore, existing saw blades are prone to imbalance due to uneven mass distribution during high-speed rotation, leading to increased vibration and noise, further affecting equipment stability and lifespan. Simultaneously, the connection method between the saw blade and the main shaft has certain limitations; traditional bolt fixing and positioning structures cannot fully meet the high-strength, high-precision assembly requirements, easily resulting in loosening or displacement, affecting processing accuracy. Therefore, optimizing the saw blade's structural design, improving its ease of installation and replacement, reducing maintenance costs, and effectively reducing vibration and noise during high-speed rotation have become urgent technical challenges. Utility Model Content

[0003] This invention aims to solve the problems of difficult saw blade replacement, easy damage, and excessive vibration and noise during high-speed rotation in the existing saw blade connection structure of the toothed cotton gin. By optimizing the saw blade structural design, a distributed saw blade connection structure is proposed to improve the processing effect, stability, and ease of maintenance of the saw blade.

[0004] This utility model provides a partitioned saw blade connection structure for a serrated cotton gin, including a distributed saw blade structure design, optimized matching of positioning rings and positioning grooves, refined reinforcing rib structure, optimized bolt selection and layout, anti-loosening design, auxiliary connection structure, and dynamic balance compensation block design. The distributed saw blade structure evenly divides the circular saw blade into three fan-shaped regions along the circumference, each region having a central angle of 120°, and ensures minimal imbalance of the saw blade during high-speed rotation through precise mass distribution optimization. Furthermore, several positioning pin holes and bolt holes are distributed around the central hole of the saw blade to ensure the stability and reliability of the connection between the saw blade and the spindle.

[0005] Specifically, the positioning ring adopts a circular structure, with an outer diameter 15-18 cm smaller than the saw blade's outer diameter to avoid interference with the ribs of the ginning machine; its inner diameter matches the saw blade shaft. The flange edge of the positioning ring contacts the saw blade, ensuring that the concentricity error is controlled within ±0.05 mm. Furthermore, an annular groove is provided on the outer circumference of the positioning ring, with an O-ring rubber seal embedded within it to increase sealing and reduce the ingress of dust and impurities, while also providing cushioning and vibration damping. During installation, the positioning ring is first assembled with the saw blade, ensuring the concentricity error between the positioning ring and the saw blade is within ±0.05 mm. Then, the saw blade and positioning ring are installed as a whole onto the shaft, allowing the positioning ring to accurately embed into the positioning groove.

[0006] Furthermore, the saw blade retaining ring is provided with radial reinforcing ribs, with 3-4 ribs radiating outwards from the center of the retaining ring towards the edge of the saw blade. Each reinforcing rib is 2-3 mm wide and has the same thickness as the retaining ring, forming a mesh structure that effectively disperses the stress generated at the joint when the saw blade rotates, improving rigidity and resistance to deformation. In particular, the design of the reinforcing ribs has been verified through finite element analysis to ensure the uniformity of stress distribution under different stress conditions, thereby ensuring its reliability in actual use.

[0007] High-strength alloy steel bolts of grade 10.9 are selected, with diameters ranging from M8 to M10 depending on the saw blade size and stress conditions. Eight to twelve bolt holes are evenly distributed around the center hole of the saw blade, with the distribution circle diameter 20 to 30 mm larger than the center hole diameter. These holes are arranged in a staggered pattern to ensure more even stress distribution on the saw blade in the circumferential direction, improving overall fixation. Furthermore, the machining accuracy of the bolt holes is controlled at H7 grade to ensure the bolt-hole fit clearance is within the allowable range, preventing connection failure due to loosening.

[0008] Specifically, the tenon is designed with a hexagonal protrusion, facilitating precise alignment between the tenon and mortise during installation, and ensuring a tighter fit under the centrifugal force generated by the rotating saw blade. Fine anti-slip textures are machined onto the contact surfaces of the tenon and mortise, with a depth controlled between 0.1 and 0.2 mm. The texture direction is perpendicular to the saw blade's rotation direction, further increasing friction and preventing relative slippage. Furthermore, the anti-slip textures are machined using laser etching to ensure consistency in depth and direction, while avoiding damage to the material surface.

[0009] The saw blade has a fan-shaped groove and a fan-shaped block auxiliary connection structure on its inner side. During installation, the fan-shaped block is embedded in the fan-shaped groove, working together with the mortise and tenon structure to restrict the relative displacement of different parts of the saw blade from multiple directions, enhancing the overall connection strength. In particular, the mating surfaces of the fan-shaped groove and the fan-shaped block are precision ground to ensure that the mating clearance is between 0.02 and 0.05 mm, thereby achieving high-precision positioning and connection.

[0010] Furthermore, a dynamic balance compensation block with an adjustable mass is installed on the back of the saw blade. Multiple threaded holes are provided on the compensation block, and counterweight screws of different masses are combined and installed to adjust the balance of the saw blade. The saw blade is tested using a dynamic balancing tester, and the number and position of the counterweight screws are adjusted based on the test results to control the imbalance of the saw blade within the allowable range, reduce vibration, and ensure long-term stable operation. In particular, the design of the dynamic balance compensation block is based on computer simulation and experimental verification to ensure its applicability and effectiveness under different working conditions.

[0011] Compared to existing technologies, this invention, through its distributed saw blade structure design, allows for replacement of only a single sector of the saw blade when some blades are damaged, reducing replacement difficulty and cost. Furthermore, the optimized positioning ring and positioning groove fit, reinforcing rib structure, bolt layout, and anti-loosening design significantly improve the overall stability and deformation resistance of the saw blade. Through optimized mass distribution and the design of dynamic balance compensation blocks, the imbalance during high-speed rotation of the saw blade is effectively reduced, thereby lowering vibration and noise. Multiple anti-loosening designs and auxiliary connection structures enhance the overall connection strength of the saw blade, extending its service life.

[0012] In summary, this utility model, through a series of innovative designs, solves the problems existing in the prior art and significantly improves the performance and practicality of the partition saw blade connection structure of the saw toothed cotton gin.

[0013] To make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of the three-dimensional structure of this utility model;

[0016] Figure 2 This is a side view of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of this utility model before installation;

[0018] Figure 4 This is a schematic diagram from another perspective before installation of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the fan-shaped saw blade and the positioning ring of this utility model;

[0020] Figure 6 This is a schematic diagram of the positioning ring of this utility model.

[0021] Numbering on the map:

[0022] 1. Frame; 2. Saw blade shaft; 3. Sector saw blade; 4. Mounting base; 5. Positioning ring; 6. Annular groove; 7. Sealing ring; 8. Center hole; 9. Reinforcing rib; 10. Sector groove; 11. Sector block; 12. Bolt; 13. Hexagonal protrusion; 14. Hexagonal hole; 15. Spindle hole; 16. Positioning groove; 17. Flange edge. Detailed Implementation

[0023] This utility model relates to the implementation process of a partition saw blade connection structure for a saw-tooth cotton gin, combined with the attached... Figure 1 To be continued Figure 6 A detailed explanation is provided. In practical applications, saw-tooth cotton gins process seed cotton using saw blades, and the processing effect is closely related to the shape of the saw blades. Therefore, the design and connection structure of the saw blades are crucial to the overall performance of the equipment. This embodiment provides a distributed saw blade connection structure, which evenly divides the circular saw blade into three sector-shaped areas along the circumference, and through optimized design, achieves efficient connection, stable operation, and convenient maintenance of the saw blades.

[0024] During implementation, the first step is to clarify the overall structural layout of the saw blade. (See attached image.) Figure 1 As shown, the saw blade shaft 2 runs through the entire saw blade assembly, and the saw blade includes a circular saw blade structure composed of multiple fan-shaped saw blades 3. Each fan-shaped saw blade 3 has a central angle of 120° and is fixed to the saw blade shaft 2 through a central hole 7. To ensure uniform mass distribution during high-speed rotation, finite element analysis was used to optimize the mass distribution of each fan-shaped saw blade 3. The surface of each fan-shaped saw blade 3 has hexagonal holes 13 for assembly and fixation with the positioning ring 5. Several positioning pin holes and bolt holes are distributed around the central hole 7 to ensure sufficient stability and reliability in the connection between the saw blade and the spindle. During installation, the fan-shaped saw blades 3 are first inserted sequentially into the saw blade shaft 2, and then the saw blade is fixed to the mounting base 4 using bolts 11. This distributed design allows for easy replacement of a damaged fan-shaped saw blade 3 simply by removing the corresponding bolt 11, significantly reducing replacement difficulty and cost.

[0025] The positioning ring 5 is designed with a circular structure to accommodate the installation requirements of the saw blade shaft 2. (See attached image.) Figure 6As shown, the outer diameter of the positioning ring 5 is 15-18 cm smaller than the outer diameter of the saw blade, while its inner diameter matches the saw blade shaft 2. The flange 16 is located on the outer side of the positioning ring 5, used to contact the saw blade and ensure that the concentricity error is controlled within ±0.05 mm. Furthermore, an annular groove 6 is machined on the outer circumference of the positioning ring 5, and an O-ring rubber seal 61 is embedded in the groove to enhance the sealing between the positioning ring 5 and the positioning groove 15, preventing dust and impurities from entering the positioning area, while also providing cushioning and vibration damping. During installation, the positioning ring 5 and the saw blade are pre-assembled to ensure that the concentricity error meets the requirements, and then the entire assembly is installed onto the saw blade shaft 2, so that the positioning ring 5 is accurately embedded in the positioning groove 15. After installation, a special tool is used to check the fit clearance between the positioning ring 5 and the positioning groove 15 to ensure that the clearance is uniform and there is no jamming.

[0026] The arrangement of reinforcing rib 8 further enhances the overall rigidity and deformation resistance of the saw blade. (See attached image) Figure 2 As shown, 3-4 reinforcing ribs 8 are radially distributed from the center of the fixing ring towards the edge of the saw blade. Each reinforcing rib 8 is 2-3 mm wide and has the same thickness as the fixing ring. These reinforcing ribs 8 form a mesh structure, which can effectively disperse the stress generated by the saw blade during high-speed rotation, especially significantly improving the stress concentration problem at the splicing area. To verify the reliability of the reinforcing ribs 8, the stress distribution under different working conditions was simulated by finite element analysis. The results show that the design of the reinforcing ribs 8 can achieve uniform stress distribution, thereby avoiding deformation or breakage caused by excessive local stress. In practical applications, the machining accuracy of the reinforcing ribs 8 is controlled within ±0.02 mm to ensure that its fit with other components meets the requirements.

[0027] The selection and layout optimization of bolt 11 is an important part of this embodiment. Bolt 11 is made of 10.9 grade high-strength alloy steel, and its diameter is selected from M8 to M10 based on the saw blade size and stress conditions. (See attached...) Figure 3 As shown, 8-12 bolt holes are evenly distributed around the central hole 7 of the saw blade, with the diameter of the distribution circle being 20-30mm larger than the diameter of the central hole 7. The machining accuracy of the bolt holes is controlled at H7 grade to ensure that the fit clearance between the bolt 11 and the hole is within the allowable range, avoiding loosening. The bolt holes are arranged in a staggered manner, making the force on the saw blade more uniform in the circumferential direction, further improving the overall fixing effect. During installation, a torque wrench is used to apply the specified tightening torque to the bolt 11 to ensure that the preload of each bolt 11 is consistent, thereby avoiding connection failure due to uneven force.

[0028] Anti-loosening design is one of the key measures to ensure the long-term stable operation of the saw blade. (See attached image) Figure 4As shown, the tenon is designed with a hexagonal protrusion 12 for precise alignment with the mortise during installation. Under the centrifugal force generated by the rotating saw blade, the hexagonal protrusion 12 engages more tightly with the mortise, thus improving connection strength. Simultaneously, fine anti-slip textures are machined on the contact surfaces of the tenon and mortise, with a depth controlled within the range of 0.1-0.2mm. The texture direction is perpendicular to the saw blade's rotation direction, further increasing friction and preventing relative slippage. The anti-slip textures are machined using laser etching to ensure consistency in texture depth and direction while avoiding damage to the material surface. Furthermore, the inner side of the saw blade is equipped with a fan-shaped groove 9 and a fan-shaped block 10 as auxiliary connection structures. During installation, the fan-shaped block 10 is embedded in the fan-shaped groove 9, working in conjunction with the mortise and tenon structure to restrict the relative displacement of different parts of the saw blade from multiple directions, enhancing overall connection strength. The mating surfaces of the sector groove 9 and the sector block 10 are precision ground to ensure that the mating clearance is within the range of 0.02-0.05mm, thereby achieving high-precision positioning and connection.

[0029] To reduce vibration and noise during high-speed saw blade rotation, a dynamic balancing compensation block design was incorporated in this embodiment. (See attached...) Figure 5 As shown, a dynamic balancing compensation block with an adjustable mass is installed on the back of the saw blade. Multiple threaded holes are provided on the compensation block, allowing for the adjustment of the saw blade's balance by combining and installing counterweight screws of different masses. After the saw blade is installed on the cotton gin, a dynamic balancing tester is used to inspect it. Based on the test results, the number and position of the counterweight screws are adjusted to control the saw blade's imbalance within acceptable limits. The design of the dynamic balancing compensation block is based on computer simulation and experimental verification, ensuring its applicability and effectiveness under different working conditions. Through these measures, the vibration of the saw blade during high-speed rotation is effectively suppressed, thereby ensuring the long-term stable operation of the saw blade connection and fixing structure.

[0030] In actual operation, the saw blade shaft 2 drives the saw blade to rotate at high speed, and the saw teeth on the saw blade process the seed cotton. Because the saw blades adopt a distributed design, each sector saw blade 3 works independently. Therefore, even if a sector saw blade 3 is damaged, only the individual sector area needs to be replaced to restore normal equipment operation. During replacement, first use a tool to loosen the bolt 11 in the corresponding area, remove the damaged sector saw blade 3, then install the new sector saw blade 3 and retighten the bolt 11. After installation, the saw blade is tested again using a dynamic balancing tester to ensure that the imbalance is still within the allowable range. The entire replacement process is simple to operate, reducing maintenance costs and downtime.

[0031] In summary, this embodiment solves the problems of difficult saw blade replacement, easy damage, and excessive vibration and noise during high-speed rotation in the prior art through distributed saw blade structure design, optimized cooperation between positioning ring 5 and positioning groove 15, arrangement of reinforcing ribs 8, optimized selection and layout of bolts 11, anti-loosening design, and the introduction of dynamic balance compensation blocks. Through practical application scenarios, the partitioned saw blade connection structure of the saw-toothed cotton gin provided in this embodiment can significantly improve the processing effect, operational stability, and maintenance convenience of the equipment, and has broad application prospects.

[0032] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A saw blade connection structure for a toothed cotton gin, comprising a saw blade shaft (2), a fan-shaped saw blade (3), a positioning ring (5), reinforcing ribs (8), bolts (11), and a dynamic balance compensation block, characterized in that, The fan-shaped saw blade (3) is evenly divided into three areas along the circumference, with a central angle of 120° for each area. The positioning ring (5) is set around the central hole (7) of the saw blade and cooperates with the saw blade shaft (2). The reinforcing ribs (8) are radially distributed from the center of the fixing ring shaft to the edge of the saw blade. The bolts (11) are arranged in an alternating manner around the central hole (7) of the saw blade. The dynamic balance compensation block is installed on the back of the saw blade.

2. The saw blade connection structure for a toothed cotton gin as described in claim 1, characterized in that: The outer diameter of the positioning ring (5) is 15 to 18 cm smaller than the outer diameter of the saw blade, and the inner diameter matches the saw blade shaft (2). The flange edge (16) contacts the saw blade and ensures that the concentricity error is controlled within ±0.05 mm.

3. The saw blade connection structure for a toothed cotton gin as described in claim 2, characterized in that: The positioning ring (5) has an annular groove (6) on its outer circumference, and an O-ring rubber seal (61) is embedded in the annular groove (6).

4. The saw blade connection structure for a toothed cotton gin as described in claim 1, characterized in that: The number of reinforcing ribs (8) is 3 to 4, and the width of each reinforcing rib (8) is 2 to 3 mm, and the thickness is the same as that of the fixing ring.

5. The saw blade connection structure for a toothed cotton gin as described in claim 4, characterized in that: The uniformity of stress distribution of the reinforcing rib (8) under different stress conditions was verified by finite element analysis.

6. The saw blade connection structure for a toothed cotton gin as described in claim 1, characterized in that: The bolt (11) is made of 10.9 grade high-strength alloy steel with a diameter of M8 to M10. The bolt holes are distributed around the central hole (7) and the diameter of the distribution circle is 20 to 30 mm larger than the diameter of the central hole (7).

7. The saw blade connection structure for a toothed cotton gin as described in claim 6, characterized in that: The machining accuracy of the bolt hole is controlled at H7 level to ensure that the fit clearance between the bolt (11) and the hole is within the allowable range.

8. The saw blade connection structure for a toothed cotton gin as described in claim 1, characterized in that: The dynamic balance compensation block is provided with multiple threaded holes, and the balance of the saw blade can be adjusted by combining and installing counterweight screws of different masses.

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