Modular excavation system

Abstract

The application discloses a modularized excavating system, which comprises a tooth holder, a tooth pin and a tooth. The tooth holder comprises a first pin through hole which is opened along a longitudinal direction. The tooth pin is longitudinally penetrated through the first pin through hole and a second pin through hole of the tooth. The tooth pin is fixedly connected with the tooth holder by tightly abutting against the inner walls of the first pin through hole and the second pin through hole. The tooth pin is penetrated through the tooth holder and the tooth along a vertical direction. At this time, the axis of the tooth pin is parallel to the main tension direction of the tooth during working. The uniform axial stress distribution is generated at the position of the tooth pin, the shear stress component is avoided, the connecting strength and the using strength of the tooth relative to the tooth holder are improved, and the replacement frequency of the tooth is effectively reduced.

Description

Technical Field

[0001] This application relates to the field of excavation engineering technology, and more specifically to a modular excavation system. Background Technology

[0002] Currently, in the excavating equipment field, the reliability of the connection between the bucket teeth and the tooth holder directly determines the equipment's working efficiency and maintenance costs. In related technologies, bucket teeth are typically connected to the tooth holder via a transverse pin, meaning the pin's axis is perpendicular to the main force direction of the bucket teeth during operation. However, this structure has a significant drawback: when the bucket teeth cut into the material, the main load they bear is axial tensile or compressive force along the working direction, while the transverse pin, being perpendicular to the force direction, primarily bears shear stress. Shear stress concentration easily leads to pin deformation, breakage, or wear of the tooth holder hole wall, resulting in problems such as loose connection and bucket tooth misalignment, forcing frequent equipment shutdowns for component replacement. Furthermore, the shear stress-dominated stress mode means that the material's tensile strength is not fully utilized, leading to structural redundancy and resource waste.

[0003] Therefore, in traditional transverse pin structures, the shear stress concentration easily leads to low connection strength and easy damage of the bucket tooth assembly, which has become an urgent problem to be solved. Utility Model Content

[0004] The purpose of this application is to provide a modular excavation system to solve the problems of low connection strength and easy damage and failure of the bucket tooth structure.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a modular excavation system is provided, comprising: a tooth base, the tooth base including a first pin through hole opened in the longitudinal direction; a bucket tooth pin; a bucket tooth, the bucket tooth including a second pin through hole opened in the longitudinal direction, the bucket tooth pin passing longitudinally through the first pin through hole and the second pin through hole, and closely abutting the inner wall of the first pin through hole and the second pin through hole to fixally connect the bucket tooth and the tooth base.

[0006] As a preferred embodiment, the bucket tooth pin includes a metal reinforcing layer and an elastic layer, wherein the elastic layer and the metal reinforcing layer are stacked together, and the metal reinforcing layer is directionally compressed and deformed so that the metal reinforcing layer is tightly attached to the inner wall of the first pin through hole and the second pin through hole.

[0007] As another preferred embodiment, the metal reinforcing layer includes: a first metal portion and a second metal portion, the elastic layer being sandwiched between the first metal portion and the second metal portion, and the outer surface of the elastic layer forming a recessed elastic deformation zone between the outer surface of the elastic layer and the adjacent metal portion; wherein, the maximum deformation protrusion of the elastic deformation zone is lower than the outer wall surface of the first metal portion and the second metal portion.

[0008] Further preferably, the bucket tooth pin includes a first end and a second end along the insertion direction. The first end is provided with a protruding guide limiting part. When the bucket tooth pin passes through the tooth seat and the bucket tooth, the guide limiting part abuts against the tooth seat to prevent the bucket tooth pin from coming out in the opposite direction of insertion.

[0009] Further preferably, the second end of the bucket tooth pin is provided with a radially protruding locking arc surface. When the bucket tooth pin passes through the tooth seat and the bucket tooth, the locking arc surface is located close to the outer wall of the tooth seat. The protrusion height of the locking arc surface is distributed in an arc shape that decreases along the insertion direction of the bucket tooth pin, so as to cooperate with the guide limiting part to form a one-way sliding constraint structure.

[0010] More preferably, the surface of the first metal part facing the second metal part is provided with at least one positioning boss, the positioning boss penetrating the elastic layer and embedded in the second metal part to form a through-type interlocking structure.

[0011] Preferably, the bucket tooth includes an integrally formed tooth tip and a bucket tooth end, the second pin through hole is provided at the bucket tooth end, and the two ends of the second pin through hole are respectively formed with: a first relief groove, the first relief groove being a limiting cavity matching the contour of the locking arc surface; and a second relief groove, the second relief groove being adapted to the shape of the guide limiting part of the bucket tooth pin.

[0012] Preferably, the outer surface of the end of the bucket tooth forms an annular boss around the second pin through hole.

[0013] Preferably, the modular excavation system further includes a cutter plate, and the toothed seat is pinned or welded to the cutter plate.

[0014] More preferably, the tooth holder includes a first end face and a second end face, the first end face being used to fit against the upper end face of the blade plate, the second end face being used to fit against the lower end face of the blade plate, and the first end face and the second end face being arranged parallel to each other.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] In this application, the bucket tooth pin penetrates the tooth holder and the bucket tooth in a vertical direction. At this time, the axis of the bucket tooth pin is parallel to the direction of the main tensile force when the bucket tooth is working. The position of the bucket tooth pin generates a uniform axial stress distribution, avoids the generation of shear stress components, improves the connection strength and service strength of the bucket tooth relative to the tooth holder, and effectively reduces the frequency of bucket tooth replacement.

[0017] Furthermore, the vertical arrangement of the bucket tooth pins in this application allows the operator to apply force directly to the bucket tooth pins in the vertical direction, with no restriction on the operating space and no need to adjust the tool angle.

[0018] Meanwhile, this application utilizes an integrated through-hole design for the bucket tooth pin, avoiding the axial misalignment risk associated with split-type pins. The through-hole bucket tooth pin in this application, constrained by a single axis, ensures that the relative displacement between the tooth seat and the bucket tooth is completely limited. This integral structure of the bucket tooth pin reduces secondary wear caused by loosening, extending the service life of the connecting components. Furthermore, the through-hole bucket tooth pin employs a single axial assembly path; during installation, only the first and second pin through holes need to be aligned for positioning, saving assembly time. During maintenance, the through-hole characteristic of the pin allows for quick replacement via direct hammering or hydraulic ejection, without disassembling surrounding structural components.

[0019] When the bucket tooth pin is inserted into the tooth holder and the bucket tooth, the bucket tooth pin and the inner wall area of ​​the first pin through hole opened in the tooth holder make an interference fit to generate a preload force. The elastic layer, as an intermediate medium, can effectively increase the fastening strength between the bucket tooth pin and the pin through hole and improve the interference fit effect between the bucket tooth pin and the pin through hole. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the modular excavation system.

[0021] Figure 2 This is another structural diagram of a modular excavation system;

[0022] Figure 3 This is a side sectional view of the assembly of the tooth holder and the bucket teeth with the blade plate.

[0023] Figure 4 A schematic diagram of the assembly of the tooth holder and the bucket teeth;

[0024] Figure 5 A schematic diagram of the partial structure from a top view after the tooth holder and bucket teeth are assembled;

[0025] Figure 6 This is a schematic diagram of the structure from a rear view after the tooth holder and bucket teeth are assembled.

[0026] Figure 7 This is a partial sectional view of the assembled tooth base and bucket teeth.

[0027] Figure 8 This is a schematic diagram of the structure of the bucket tooth pin;

[0028] Figure 9 This is another structural schematic diagram of the bucket tooth pin.

[0029] In the diagram: 1. Modular excavation system; 10. Tooth seat; 11. First end face; 12. Second end face; 13. First pin through hole; 20. Bucket tooth; 21. Tooth tip; 22. Bucket tooth end; 221. Annular boss; 23. Second pin through hole; 24. First clearance groove; 25. Second clearance groove; 26. Flanged structure; 30. Blade plate; 40. Bucket tooth pin; 41. Metal reinforcing layer; 411. First metal part; 412. Second metal part; 42. Elastic layer; 421. Elastic deformation zone; 43. First end; 431. Guide limiting part; 44. Second end; 441. Locking arc surface; 45. Positioning boss. Detailed Implementation

[0030] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0034] In a preferred embodiment, see Figures 1 to 9This application provides a modular excavation system 1, comprising: a tooth holder 10, the tooth holder 10 including a first pin through hole 13 opened in the longitudinal direction; a bucket tooth pin 40; and a bucket tooth 20, the bucket tooth 20 including a second pin through hole 23 opened in the longitudinal direction, the bucket tooth pin 40 passing longitudinally through the first pin through hole 13 and the second pin through hole 23, and closely abutting the inner walls of the first pin through hole 13 and the second pin through hole 23 to fix the bucket tooth 20 and the tooth holder 10.

[0035] Specifically, the tooth holder 10 engages with the bucket tooth 20 via the bucket tooth pin 40 to form a single bucket tooth assembly structure. When the modular excavation system 1 is in operation, the bucket tooth 20 needs to be inserted into the soil or other objects to be excavated. At this time, the bucket tooth 20 becomes the main load-bearing component, and the direction of the force is consistent with the insertion direction of the bucket tooth pin 40 in this application. Therefore, compared to the connection between the tooth holder 10 and the bucket tooth 20 via a horizontal pin in related technologies, the bucket tooth pin 40 in this application penetrates the tooth holder 10 and the bucket tooth 20 vertically. In this case, the axis of the bucket tooth pin 40... The line is parallel to the main pulling force direction of the bucket tooth 20 during operation. However, in related technologies, the horizontal pin structure makes the pin perpendicular to the main force direction. At this time, the pin is subjected to a large lateral shear force. Therefore, during the use of the bucket tooth 20, shear stress dominates and stress concentration is easily generated at the pin position. However, this application uses the vertical insertion structure of the bucket tooth pin 40 to generate a uniform axial stress distribution at the position of the bucket tooth pin 40, avoids the generation of shear stress components, improves the connection strength and service strength of the bucket tooth 20 relative to the tooth seat 10, and effectively reduces the replacement frequency of the bucket tooth 20.

[0036] Furthermore, in the related technology, the horizontally arranged bucket tooth pin 40, due to the spacing of multiple bucket tooth components, results in a narrow operating range between two adjacent bucket tooth components, making it difficult to disassemble the bucket tooth pin 40 by hammering. However, the vertical arrangement of the bucket tooth pin 40 in this application allows the operator to directly apply force to the bucket tooth pin 40 in the vertical direction, with unrestricted operating space and no need to adjust the tool angle.

[0037] Meanwhile, this application document avoids the axial misalignment risk that may exist in separate pin designs by using an integrated through-hole design of the tooth pin 40 through the tooth seat 10 and the tooth 20. The through-hole tooth pin 40 in this application document, through a single axis constraint, ensures that the relative displacement between the tooth seat 10 and the tooth 20 is completely limited. This integral structure of the tooth pin 40 reduces secondary wear caused by its own loosening, extending the service life of the connecting components. Furthermore, the through-hole tooth pin 40 adopts a single axial assembly path; during installation, only the alignment of the first pin through-hole 13 and the second pin through-hole 23 is required to complete the positioning, saving assembly time. During maintenance, the through-hole characteristic of the pin allows for quick replacement by direct hammering or hydraulic ejection, without disassembling surrounding structural components. In contrast, separate pin designs in related technologies often require the disassembly of multiple components in a specific sequence, and the concealed pin section is prone to corrosion, increasing the difficulty of disassembly and leading to higher maintenance costs.

[0038] As a preferred option, see Figures 7 to 9 The bucket tooth pin 40 includes a metal reinforcing layer 41 and an elastic layer 42. The elastic layer 42 and the metal reinforcing layer 41 are stacked together. The elastic layer 42 is directionally compressed and deformed so that the metal reinforcing layer 41 is tightly attached to the inner wall of the first pin through hole 13 and the second pin through hole 23.

[0039] The metal reinforcing layer 41 is specifically made of a high-strength alloy or cast iron material. Through its high rigidity and tensile strength, it undertakes the main load transmission function and ensures that the bucket tooth pin 40 maintains structural stability when subjected to impact or vibration. The elastic layer 42 is specifically made of rubber material, which can adapt to the operating environment between -40 degrees and 120 degrees without failure. The main function of the elastic layer 42 is to ensure a tight fit between the bucket tooth pin 40 and the first pin through hole 13 and the second pin through hole 23. The auxiliary function of the elastic layer 42 is to absorb vibration energy through elastic deformation and reduce the risk of stress concentration.

[0040] Specifically, when the bucket tooth pin 40 is inserted into the tooth holder 10 and the bucket tooth 20, the bucket tooth pin 40 and the inner wall area of ​​the first pin through hole 13 opened in the tooth holder 10 make an interference fit to generate a preload force. The elastic layer 42, as an intermediate medium, can effectively increase the fastening strength between the bucket tooth pin 40 and the pin through hole, and improve the interference fit effect between the bucket tooth pin 40 and the pin through hole.

[0041] As another preferred embodiment, the metal reinforcing layer 41 includes: a first metal part 411 and a second metal part 412, an elastic layer 42 sandwiched between the first metal part 411 and the second metal part 412, and an elastic deformation area 421 provided by a recess between the outer surface of the elastic layer 42 and the adjacent metal part; wherein, the maximum deformation protrusion of the elastic deformation area 421 is lower than the outer wall surface of the first metal part 411 and the second metal part 412.

[0042] Specifically, the elastic deformation zone 421 is distributed on the top and sides of the elastic layer 42, and the elastic deformation zone 421 is a rubber recess structure. When the tooth pin 40 is inserted into the tooth seat 10 and the tooth 20, the first metal part 411 and the second metal part 412 of the cast iron structure will be squeezed by the inner wall of the first pin through hole 13. As a result, the first metal part 411 and the second metal part 412 will further squeeze the elastic layer 42. The elastic layer 42 will deform to a certain extent after being squeezed. At this time, the elastic deformation zone 421 can effectively smooth out the deformation of the elastic layer 42. The deformation of the elastic layer 42 after being compressed is restricted within the elastic deformation zone 421, so that the deformation protrusion of the rubber elastic layer 42 will not exceed the outer wall of the first metal part 411 and the second metal part 412. The deformation protrusion is always lower than the outer wall of the metal layer, avoiding the problem of increased frictional resistance or assembly interference caused by excessive expansion of the elastic material.

[0043] Further preferably, the bucket tooth pin 40 includes a first end 43 and a second end 44 along the insertion direction. The first end 43 is provided with a protruding guide limiting part 431. When the bucket tooth pin 40 passes through the tooth seat 10 and the bucket tooth 20, the guide limiting part 431 abuts against the tooth seat 10 to prevent the bucket tooth pin 40 from coming out in the opposite direction of insertion.

[0044] Among them, see Figure 7 and Figure 8 The guide limiting part 431 is a sloping boss structure. The sloping part of the guide limiting part 431 guides the insertion of the bucket tooth pin 40, and the contact surface between the protrusion and the tooth seat 10 helps the operator to perceive the insertion depth, avoiding the phenomenon of incomplete connection caused by the pin not being fully in place, so as to facilitate the assembly of the bucket tooth pin 40. At the same time, the guide limiting part 431 forms a mechanical limit through the protrusion. When the pin is fully inserted into the tooth seat 10 and the bucket tooth 20, its protrusion contacts the tooth seat 10 to form a physical block. This design effectively prevents the pin from coming out in the reverse direction of insertion when vibrating or subjected to reverse force.

[0045] Further preferably, the second end 44 of the bucket tooth pin 40 is provided with a radially protruding locking arc surface 441. When the bucket tooth pin 40 passes through the tooth seat 10 and the bucket tooth 20, the locking arc surface 441 is located close to the outer wall of the tooth seat 10. The protrusion height of the locking arc surface 441 forms a geometric self-locking effect with the outer wall of the tooth seat 10. When the bucket tooth pin 40 is fully inserted, the contact area between the locking arc surface 441 and the outer wall of the tooth seat 10 generates a wedge-shaped friction force, which effectively prevents further movement of the bucket tooth pin 40 under normal assembly.

[0046] The height of the protrusion of the locking arc surface 441 decreases in an arc shape along the insertion direction of the bucket tooth pin 40, so as to form a one-way sliding constraint structure with the guide limiting part 431. That is, the bucket tooth pin 40 is a one-way pin structure in this application. The protrusion of the guide limiting part 431 forms a barb structure. When it is necessary to remove the bucket tooth pin 40, it can only be removed by impact such as hammering. Then, with the help of the arc-shaped locking arc surface 441, the bucket tooth pin 40 can only be dislodged along the insertion direction.

[0047] More preferably, the surface of the first metal part 411 facing the second metal part 412 is provided with at least one positioning boss 45, the positioning boss 45 penetrates the elastic layer 42 and is embedded in the second metal part 412 to form a through-type interlocking structure.

[0048] Specifically, the positioning boss 45 is integrally formed with the first metal part 411, and is preferably made of cast iron. The positioning boss 45 extends through the elastic layer 42 and into the second metal part 412, so as to connect the first metal part 411, the second metal part 412 and the elastic layer 42 through the positioning boss 45, so as to ensure the integrity of the bucket tooth pin 40. When the operator uses a hammer or other objects with strong impact to strike the bucket tooth pin 40, even if the hammer hits either the first metal part 411 or the second metal part 412, the relative slippage between the metal layer and the elastic layer 42 can be effectively suppressed by the positioning boss 45 of the metal structure and the slot of the second metal part 412. The bucket tooth pin 40 is kept moving as a whole by the connecting effect of the positioning boss 45.

[0049] Preferably, the bucket tooth 20 includes an integrally formed tooth tip 21 and a bucket tooth end 22. The bucket tooth end 22 is provided with a second pin through hole 23 that is concentric with the axial direction of the bucket tooth pin 40. The two ends of the second pin through hole 23 are respectively formed with: a first relief groove 24, which is a limiting cavity that matches the contour of the locking arc surface 441; and a second relief groove 26, which is adapted to the shape of the guide limiting part 431 of the bucket tooth pin 40.

[0050] Specifically, the precise matching of the first clearance groove 24 with the contour of the locking arc surface 441 forms a three-dimensional limiting cavity, which achieves circumferential constraint through curved surface contact, and can suppress the rotational displacement of the bucket tooth pin 40 caused by vibration or lateral load. Similarly, the shape of the second clearance groove 26 is adapted to the guide limiting part 431, which further suppresses the rotational displacement of the bucket tooth pin 40 caused by vibration or lateral load.

[0051] Furthermore, the depth of the first clearance groove 24 is greater than the protrusion height of the locking arc surface 441. Similarly, the depth of the second clearance groove 26 is greater than the protrusion height of the guide limiting part 431. By reserving sufficient space, this ensures that the locking arc surface 441 and the guide limiting part 431 are always within a controllable elastic deformation range during assembly and use. At the same time, the depth margin of the second clearance groove 26 forms a retraction channel when the bucket tooth pin 40 is disassembled, allowing the guide limiting part 431 to gradually disengage from the engaged state.

[0052] Meanwhile, the geometric features of the first clearance groove 24 and the second clearance groove 26 distributed at both ends of the second pin through hole 23 form a self-positioning structure. Operators can achieve precise positioning of the bucket tooth pin 40 at the position of the bucket tooth 20 without the need for special tools. The cavity guide locking arc surface 441 of the first clearance groove 24 is aligned. During maintenance and disassembly, the space reserved by the first clearance groove 24 and the second clearance groove 26 can prevent the bucket tooth pin 40 from unexpectedly rotating and jamming due to rust or deformation, making it easy to remove the bucket tooth pin 40.

[0053] Preferred, see Figure 4 An annular boss 221 is formed on the outer surface of the end of the bucket tooth 22 around the second pin through hole 23. The annular boss forms a local reinforcement zone through geometric thickening, which can transform the concentrated load transmitted by the pin into circumferential distributed stress. For example, when the pin is subjected to axial impact, the annular contour of the boss makes the bending moment distribution on the outer wall of the end of the bucket tooth 22 more uniform. Compared with the structure without the boss, the stress peak at the root of the end of the bucket tooth 22 is reduced. At the same time, the integrated design of the annular boss and the body of the end of the bucket tooth 22 avoids the strength weakening problem caused by welding or bolt connection. The preferred layout logic of the annular reinforcing plate further improves the torsional stiffness, which is especially suitable for multi-directional composite load conditions in excavation operations.

[0054] Furthermore, the height of the annular boss above the surface of the end 22 of the bucket tooth forms a physical barrier, preventing external rocks and debris from directly impacting the contact surface between the pin end and the end 22 of the bucket tooth. During dynamic operation, the outer edge of the boss preferentially contacts foreign objects, protecting the internal pin connection interface through sacrificial wear. The concave cavity of the annular boss provides a receiving space for the pin end, and the axial coverage ensures that the pin end is completely within the outline of the annular boss. Therefore, the annular boss in this application achieves a concealed pin design, avoiding accidental snagging caused by exposed pins.

[0055] Preferred, see Figure 1 and Figure 2The modular excavation system 1 also includes a cutter plate 30, and the tooth holder 10 is pin-connected or welded to the cutter plate 30. Multiple bucket tooth assemblies are spaced apart on the cutter plate 30. The cutter plate 30 has beveled structures on both sides. The bucket tooth assemblies located on both sides of the cutter plate 30 have a certain angle relative to the other bucket tooth assemblies. The force distribution among the multiple bucket tooth assemblies is more uniform, so as to better adapt to the specific working conditions.

[0056] Therefore, specifically, welding the toothed seat 10 and the blade 30 together is suitable for high-load fixed scenarios. Its integrated molding characteristics can improve structural rigidity, especially adapting to the bending resistance requirements under excavation impact loads. For example, in hard rock breaking conditions, the welded interface forms a continuous force transmission path through metallurgical bonding, avoiding the problem of gap expansion caused by fretting wear of the pin joint.

[0057] The pin-connected tooth holder 10 and the blade plate 30 are suitable for applications where the bucket tooth assembly or blade plate 30 needs to be frequently replaced. The axial pins enable quick disassembly and assembly, allowing each component to be replaced individually. This method offers advantages such as strong versatility, simple and efficient maintenance, and low operating costs, while also retaining the possibility of adjusting the installation angle of the tooth holder 10.

[0058] Further preferably, the gear seat 10 includes a first end face 11 and a second end face 12. The first end face 11 is used to fit against the upper end face of the blade plate 30, and the second end face 12 is used to fit against the lower end face of the blade plate 30. The first end face 11 and the second end face 12 are arranged parallel to each other.

[0059] Specifically, the double parallel end faces provide a standardized reference surface for welding operations, ensuring the fit between the toothed seat 10 and the blade plate 30. The parallelism of the end faces eliminates welding gaps, avoiding defects such as incomplete welding or slag inclusions caused by local misfitting. Furthermore, the welding heat input is evenly distributed, reducing the impact of welding deformation on structural accuracy. The full-area contact between the end faces and the blade plate 30 forms a continuous weld bearing zone, making the weld length and distribution more controllable and significantly improving the strength of the welded joint.

[0060] Further, see Figure 5 and Figure 6The end of the bucket tooth 22 is also provided with a flange structure 25, which is integrally formed with the end of the bucket tooth 22. The flange structure 25 is located at the contact position between the end of the bucket tooth 22 and the tooth holder 10. When the tooth holder 10 and the blade 30 are connected by welding, the bucket tooth 20 and the tooth holder 10 are connected by a bucket tooth pin 40. Therefore, the replacement of the bucket tooth 20 is relatively convenient, while the replacement and maintenance of the tooth holder 10 relative to the blade 30 is more cumbersome. Therefore, the flange structure 25 makes the contact position between the end of the bucket tooth 22 and the tooth holder 10 more convenient. The tooth holder 10 has a relatively wide structure. The outward expansion design of the flange structure 25 forms a surrounding protective band at the joint surface between the end 22 of the bucket tooth and the tooth holder 10. When the bucket tooth 20 cuts into the material and bears the impact load, the wide contact surface of the flange structure 25 will preferentially contact the external hard particles or sharp objects. It will absorb some of the impact energy through its own deformation, thereby blocking the destructive stress directly acting on the surface of the tooth holder 10. This can effectively protect the tooth holder 10 from damage during high-intensity use, thereby reducing the frequency of replacement and maintenance of the tooth holder 10.

[0061] And preferably, see Figure 4 The contact surface between the flange structure 25 and the tooth holder 10 forms a U-shaped structure. Specifically, the inner side of the flange structure 25 and the mating surface of the tooth holder 10 form a geometrically complementary nested structure, which constrains the displacement freedom of the tooth holder 10 in the horizontal direction, enhances the overall torsional stiffness, effectively prevents the bucket tooth 20 from rotating axially relative to the tooth holder 10, and improves the overall stability and strength of the bucket tooth assembly. At the same time, this nested structure provides an intuitive positioning reference for subsequent maintenance operations, making it easy to quickly identify the docking status between the end of the bucket tooth 22 and the tooth holder 10, effectively reducing the risk of assembly misalignment.

[0062] Furthermore, the modular excavation system 1 in this application document can be produced in a standardized manner. Through the standardization of structural design and the uniformity of interfaces, it provides a basic support for large-scale production. Its core lies in the fact that the geometric parameters and connection forms of each functional component, such as the tooth holder 10, the bucket tooth 20, and the bucket tooth pin 40, follow strict matching rules. The double parallel end faces of the tooth holder 10 and the outline dimensions of the flange structure 25 at the end of the bucket tooth 22 all adopt a unified tolerance zone design. The above standardization allows different parts to be manufactured in parallel on independent production lines without the need to repeatedly adjust the processing parameters for specific working conditions, which significantly reduces the complexity of production. The vertical through-hole design of the bucket tooth pin 40 further simplifies the assembly process. Features such as the locking arc surface 441 and the anti-detachment barb between the tooth holder 10 and the bucket tooth 20 achieve precise alignment through a preset mating relationship. Assembly can be completed simply by completing the insertion and clamping operations in a fixed sequence.

[0063] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A modular excavation system, characterized in that, include: The toothed seat includes a first pin through hole opened in the longitudinal direction; Bucket tooth pin; The bucket tooth includes a second pin through hole opened in the longitudinal direction. The bucket tooth pin passes through the first pin through hole and the second pin through hole in the longitudinal direction and is close to the inner wall of the first pin through hole and the second pin through hole to fix the bucket tooth and the tooth seat.

2. The modular excavation system as described in claim 1, characterized in that, The bucket tooth pin includes a metal reinforcing layer and an elastic layer, which are stacked together. The elastic layer is directionally compressed and deformed so that the metal reinforcing layer is tightly attached to the inner wall of the first pin through hole and the second pin through hole.

3. The modular excavation system as described in claim 2, characterized in that, The metal reinforcing layer includes a first metal part and a second metal part, and the elastic layer is sandwiched between the first metal part and the second metal part. A recessed elastic deformation area is formed between the outer surface of the elastic layer and the adjacent metal part. Wherein, the maximum deformation protrusion of the elastic deformation zone is lower than the outer wall surface of the first metal part and the second metal part.

4. The modular excavation system as described in claim 1, characterized in that, The bucket tooth pin includes a first end and a second end along the insertion direction. The first end is provided with a protruding guide limiting part. When the bucket tooth pin passes through the tooth seat and the bucket tooth, the guide limiting part abuts against the tooth seat to prevent the bucket tooth pin from coming out in the opposite direction of insertion.

5. The modular excavation system as described in claim 4, characterized in that, The second end of the bucket tooth pin is provided with a radially protruding locking arc surface. When the bucket tooth pin passes through the tooth seat and the bucket tooth, the locking arc surface is located close to the outer wall of the tooth seat. The protrusion height of the locking arc surface is distributed in an arc shape that decreases along the insertion direction of the bucket tooth pin, so as to cooperate with the guide limiting part to form a one-way sliding constraint structure.

6. The modular excavation system as described in claim 3, characterized in that, The surface of the first metal part facing the second metal part is provided with at least one positioning boss, which penetrates the elastic layer and is embedded in the second metal part to form a through-type interlocking structure.

7. The modular excavation system as described in claim 5, characterized in that, The bucket tooth includes an integrally formed tooth tip and a bucket tooth end. The second pin through hole is located at the end of the bucket tooth, and the two ends of the second pin through hole are respectively formed with: The first clearance groove is a limiting cavity that matches the contour of the locking arc surface; The second clearance groove is adapted to the shape of the guide limiting part of the bucket tooth pin.

8. The modular excavation system as described in claim 7, characterized in that, The outer surface of the end of the bucket tooth forms an annular boss around the second pin through hole.

9. The modular excavation system according to any one of claims 1-8, characterized in that, The modular excavation system also includes a cutter plate, and the toothed seat is pinned or welded to the cutter plate.

10. The modular excavation system as described in claim 9, characterized in that, The tooth holder includes a first end face and a second end face. The first end face is used to fit against the upper end face of the blade plate, and the second end face is used to fit against the lower end face of the blade plate. The first end face and the second end face are arranged parallel to each other.

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