A bucket side tooth structure for an excavator and an excavator

Abstract

This utility model discloses an excavator bucket side tooth structure and an excavator, belonging to the field of engineering machinery technology. It includes a side plate and side teeth. The bottom of the side plate is fixed to the bucket. The upper part of the side plate has several side plate through holes, each containing a fixing sleeve. The inner wall of the fixing sleeve has an internal thread structure. The bottom of the side teeth has a groove structure, through which the side teeth are engaged with the side plate. The lower part of the side teeth has several side tooth through holes symmetrically arranged along the thickness direction, passing through the groove structure. Each side tooth through hole corresponds to a side plate through hole. Two studs are arranged opposite each other at both ends of each side tooth through hole. The two studs symmetrically pass through the side tooth through hole and are threadedly connected to the fixing sleeve. The axial lengths of the two studs are the same, and the length of the threaded section of the two studs is equal to half the length of the internal thread structure of the fixing sleeve. This utility model solves the problem of difficult assembly and disassembly of existing side teeth and ensures stable connection of the side teeth on the bucket.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to an excavator bucket side tooth structure and an excavator. Background Technology

[0002] In the field of construction machinery, the excavator bucket, as a core working component, directly affects construction efficiency and cost. The bucket side teeth are key components resisting lateral wear, making the stability and maintainability of the side teeth and their fixing structure particularly important. Traditionally, side teeth are fixed using a pin-and-spring clamping structure. This involves creating a groove in the side plate, pre-positioning the spring and washer, and then inserting it into the pin. Axial locking is achieved through the elastic deformation of the spring. However, this structure has significant drawbacks: First, assembly and disassembly are difficult. The pin-and-spring clamping structure requires forceful hammering during installation, and the spring is prone to jamming during disassembly, often necessitating destructive operations such as gas cutting. Maintenance is time-consuming and poses safety hazards. Furthermore, its anti-loosening performance is insufficient; high-frequency vibrations during bucket operation can easily lead to spring fatigue failure or pin misalignment, causing side teeth to fall off.

[0003] In existing technologies, a method exists where the main bucket teeth are installed on the tooth holder by setting threaded structures on the main bucket teeth and tooth holders, and using bolts to connect them via the threads. While this method improves the ease of disassembly and assembly of the bucket teeth, it has the following limitations: During bucket operation, the main bucket teeth are constantly subjected to loads from multiple angles. Under these loads, the threads on the bolts and mounting structures wear down, leading to stripping and ineffective engagement. This can cause the main bucket teeth to loosen, wobble, or even fall off. Furthermore, cross-threading can occur, resulting in misaligned thread profiles and the main bucket teeth becoming tilted and misaligned, making disassembly impossible. Even if disassembled, they cannot be reinstalled. Even with the addition of spring washers at the connection points, both the threaded structure and the spring washers can be damaged under sudden, large load impacts. Additionally, the use of threaded structures on both the main bucket teeth and the tooth holder increases manufacturing costs. After the threaded structure is damaged, the connection between the bucket teeth or tooth holder cannot be effectively locked, requiring replacement of the bucket teeth or re-tapping of the tooth holder, further increasing maintenance costs.

[0004] Furthermore, the above-mentioned solution is mainly applied to the connection and fit between the main bucket teeth and the tooth seat at the front end of the bucket, rather than the fixing of the side teeth on the side plate. The force direction of the side teeth is mainly lateral shear force, which is fundamentally different from the axial impact of the main bucket teeth. In addition, the side plate is thinner than the front end of the bucket. Therefore, the threaded connection method on the main bucket teeth cannot be directly transferred to the thin plate mounting surface of the side teeth. There is a lack of efficient anti-loosening fixing solution specifically for the side teeth of the bucket in the existing technology. Utility Model Content In view of the problems existing in the prior art, this utility model provides an excavator bucket side tooth structure and excavator, which solves the problem of difficult assembly and disassembly of the existing side teeth and can effectively prevent the side teeth from falling off due to bucket shaking.

[0005] The technical solution of this utility model is as follows: In a first aspect, this utility model provides a side tooth structure for an excavator bucket, comprising a side plate and side teeth. The bottom of the side plate is fixed to the bucket. The upper part of the side plate has a plurality of side plate through holes along the thickness direction. A cylindrical fixing sleeve is provided in each of the plurality of side plate through holes. The inner wall of the fixing sleeve has an internal thread structure. The bottom of the side teeth has a groove structure. The side teeth are engaged with the side plate through the groove structure. The lower part of the side teeth has a plurality of side tooth through holes symmetrically arranged along the thickness direction of the side teeth, passing through the groove structure. Each side tooth through hole is respectively provided with a corresponding side plate through hole. Two studs are provided opposite to each other at both ends of each side tooth through hole. The two studs are respectively symmetrically passed through the side tooth through hole and threadedly connected to the fixing sleeve. The axial length of the two studs is the same, and the length of the threaded section of the two studs is equal to half the length of the internal thread structure of the fixing sleeve.

[0006] In some embodiments of this utility model, the bottom of the side plate is configured as a straight-edged structure and fixedly connected to the bucket, and the top of the side plate is provided with a positioning bevel structure that abuts against the side of the side teeth. In some embodiments of this utility model, one end of the side tooth connected to the side plate is provided with a concave arc-shaped structure, and both ends of the arc-shaped structure are provided with protruding structures, and the protruding structures are provided with side tooth through holes. In some embodiments of this utility model, the end of the stud away from the threaded section is provided with an internal hexagonal groove structure. In some embodiments of this utility model, the plurality of side plate through holes are respectively arranged at a certain distance along the length direction of the side plate. In some embodiments of this utility model, the diameter of the through hole in the side plate is equal to the diameter of the outer wall of the fixing sleeve.

[0007] In some embodiments of this utility model, the diameter of the outer wall of the fixing sleeve is greater than the diameter of the side tooth through hole, and the diameter of the side tooth through hole is equal to the inner wall diameter of the fixing sleeve.

[0008] In some embodiments of this utility model, the axial length of the fixing sleeve is consistent with the thickness of the side plate.

[0009] In some embodiments of this utility model, the sum of the axial lengths of the two studs is consistent with the thickness of the lower part of the side teeth.

[0010] In a second aspect, an excavator is provided, including the excavator bucket side tooth structure described above.

[0011] One or more technical solutions of this utility model have the following beneficial effects: This utility model provides an excavator bucket side tooth structure and excavator, solving the problem of difficult assembly and disassembly of traditional side tooth structures. A stable base is formed by pre-embedded through holes in the side plate of the fixing sleeve, and quick snap-fit ​​positioning is achieved by combining the side tooth groove structure. Two studs are symmetrically screwed into the internal thread of the fixing sleeve, allowing for assembly and disassembly with only an Allen wrench. No hammering or gas cutting is required throughout the process, significantly improving maintenance efficiency and safety. Two studs are symmetrically screwed into the fixing sleeve in both directions and precisely abut against each other to form a rigid mechanical stop structure, which completely eliminates axial movement caused by vibration. In addition, the outer wall of the fixing sleeve and the through hole of the side plate have zero clearance to prevent the fixing sleeve from moving slightly in the hole. The side tooth through hole and the inner wall of the fixing sleeve are connected by two studs with equal diameter guidance to prevent thread damage caused by off-center load. The axial length of the fixed sleeve is consistent with the thickness of the side plate, enabling full-section load transfer. As an independent consumable component, the fixed sleeve has extremely low replacement cost and protects the side plate base. This avoids the problem of traditional threaded solutions on the side plate and side teeth, where threads are easily damaged and require replacement of the side plate and side teeth after damage. The length of the stud matches the thickness of the side teeth, ensuring that the symmetrical locking position of the double studs is centered, while preventing thread failure caused by over-tightening. It is also adapted to the thickness of the side plate to ensure the connection effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an excavator bucket side tooth structure provided in Embodiment 1 of this utility model; Figure 2 This is a side sectional view of an excavator bucket side tooth structure provided in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the side plate structure provided in Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the structure of the fixing sleeve provided in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the stud structure provided in Embodiment 1 of this utility model.

[0013] In the diagram: 1. Side plate; 2. Side teeth; 3. Fixing sleeve; 4. Stud; 41. Threaded section; 42. Internal hexagonal groove structure; 5. Side plate through hole; 6. Internal thread structure; 7. Positioning bevel structure. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Example 1 In a typical embodiment of this utility model, such as Figures 1 to 5As shown, a side tooth structure for an excavator bucket is proposed, including a side plate 1 and side teeth 2. The bottom of the side plate 1 is fixed to the bucket. The upper part of the side plate 1 has several side plate through holes 5 along the thickness direction. Each of the several side plate through holes 5 has a cylindrical fixing sleeve 3. The inner wall of the fixing sleeve 3 has an internal thread structure 6. The bottom of the side teeth 2 has a groove structure. The side teeth 2 are engaged with the side plate 1 through the groove structure. The lower part of the side teeth 2 has several side tooth 2 through holes symmetrically arranged along the thickness direction of the side teeth 2, passing through the groove structure. Each side tooth 2 through hole is respectively set with a corresponding side plate through hole 5. Two studs 4 are arranged opposite each other at both ends of each side tooth 2 through hole. The two studs 4 are respectively symmetrically passed through the side tooth 2 through hole and threadedly connected to the fixing sleeve 3. The axial length of the two studs 4 is the same. The length of the threaded section 41 of the two studs 4 is equal to half the length of the internal thread structure 6 of the fixing sleeve 3.

[0016] The two studs 4 work together with the fixing sleeve 3 to form a two-way threaded interlocking anti-loosening mechanism. The internal thread of the fixing sleeve 3 cooperates with the two symmetrically arranged studs 4 to achieve a tight interlock between the two symmetrical studs 4 on the side plate 1 and the center line of the fixing sleeve 3, forming a mechanical hard stop. This completely eliminates the risk of axial movement caused by bucket vibration, and the anti-loosening effect is significantly better than that of traditional snap rings or single bolt structures.

[0017] The fixing sleeve 3 is pre-embedded in the through hole 5 of the side plate. After the side tooth 2 is positioned by the groove structure, it only needs to be screwed into the stud 4. No hammering or special hydraulic tools are required throughout the process. When disassembling, the side tooth 2 can be separated by unscrewing the stud 4 in the opposite direction, which improves maintenance efficiency.

[0018] The through hole of the side tooth 2 is coaxially aligned with the fixing sleeve 3, so that the lateral shear force is jointly borne by the stud 4, the fixing sleeve 3, and the side plate 1, avoiding the single-point stress concentration of the traditional pin structure and improving the anti-detachment ability of the side tooth 2.

[0019] The fixed sleeve 3, as an independent replaceable component, bears the wear of thread engagement, and the stud 4 only needs to be replaced with a standard part. Compared with the traditional solution where the thread is directly cut on the side plate 1 or the side tooth 2, it reduces the risk of thread damage, which can lead to stripping and cross-threading, making disassembly difficult and reducing the cost of use.

[0020] In some embodiments of this utility model, the bottom of the side plate 1 is configured as a straight edge structure and fixedly connected to the bucket, and the top of the side plate 1 is provided with a positioning bevel structure 7 that abuts against the side of the side teeth 2. In this embodiment, the straight edge structure at the bottom of the side plate 1 is adapted to the welding surface of the bucket, eliminating assembly gaps, ensuring the stability of force transmission on the bucket, and ensuring that the side plate 1 is not easily damaged or detached. The top positioning bevel structure 7 forms a surface contact guide with the side of the side tooth 2, automatically correcting the position of the side tooth 2 during installation, avoiding installation interference caused by misalignment of the through hole. Furthermore, the bevel contact structure formed by the top positioning bevel structure 7 and the side of the side tooth 2 disperses the lateral impact force, reduces the bending moment borne by the stud 4, and prevents local overload failure of the thread.

[0021] In some embodiments of this utility model, the end of the side tooth 2 connected to the side plate 1 is provided with a concave arc-shaped structure, and the two ends of the arc-shaped structure are provided with protruding structures, and the protruding structures are provided with through holes for the side tooth 2. The side tooth 2 has an inwardly concave arc-shaped structure along the length of the side plate 1, which can reduce the weight of the side tooth 2 body, facilitate installation and reduce manufacturing costs. The two ends of the arc-shaped structure are provided with protruding structures to move the through hole of the side tooth 2 downward, increase the lever arm length, and significantly improve the side tooth 2's ability to resist digging torsional loads.

[0022] In some embodiments of this utility model, the end of the stud 4 away from the threaded section 41 is provided with an internal hexagonal groove structure 42. The internal hexagonal groove structure 42 is compatible with universal wrenches, eliminating the reliance on gas cutting and hammering tools in traditional solutions, enabling rapid repairs on field construction sites. Furthermore, the recessed groove structure design does not increase the external dimensions and axial length of the stud 4, adapting to the installation space of the bucket. It also avoids the problem of the stud 4 end being exposed and directly contacting the material during bucket loading operations, which could cause wear, severe wear leading to the stud 4 falling off, and further causing the side teeth 2 to fall off.

[0023] In some embodiments of this utility model, the plurality of side plate through holes 5 are respectively arranged at a certain distance along the length direction of the side plate 1.

[0024] With this configuration, the spacing of several side plate through holes 5 matches the distribution of the protruding structural connection points of the side teeth 2, so that the force on each fixing point is uniform, avoiding local overload leading to chain failure. Furthermore, the reasonable spacing setting can prevent the through holes from weakening the overall rigidity of the side plate 1 and maintain its resistance to deformation.

[0025] In some embodiments of this utility model, the diameter of the side plate through hole 5 is equal to the diameter of the outer wall of the fixing sleeve 3, the diameter of the outer wall of the fixing sleeve 3 is greater than the diameter of the through hole of the side tooth 2, and the diameter of the through hole of the side tooth 2 is equal to the diameter of the inner wall of the fixing sleeve 3. With this configuration, the outer wall of the fixing sleeve 3 and the through hole 5 of the side plate are fitted with zero clearance, preventing the fixing sleeve 3 from fretting and wearing the side plate 1 during operation; the through hole of the side tooth 2 is equal in diameter to the inner wall of the fixing sleeve 3, ensuring that the stud 4 is automatically aligned when inserted, avoiding thread damage; the outer diameter of the fixing sleeve 3 is larger than the through hole of the side tooth 2, forming a mechanical limit with the two studs 4 to block the side tooth 2, ensuring stable connection and preventing the fixing sleeve 3 from axially dislodging.

[0026] In some embodiments of this utility model, the axial length of the fixing sleeve 3 is consistent with the thickness of the side plate 1.

[0027] With this configuration, the end face of the fixing sleeve 3 is flush with the surface of the side plate 1. The equal thickness design allows the load to be transferred through the entire cross section of the fixing sleeve 3, avoiding cracking of the side plate 1 caused by stress concentration at the step.

[0028] In some embodiments of this utility model, the sum of the axial lengths of the two studs 4 is consistent with the thickness of the lower part of the side teeth 2.

[0029] With this configuration, when the sum of the lengths of the two studs 4 equals the thickness of the side teeth 2, it can be ensured that the end faces of the two studs 4 are precisely locked in the center of the fixed sleeve 3, and the axial lengths of the two studs 4 match the fixed sleeve 3 to limit the tightening stroke, thus preventing problems such as thread stripping or cracking of the fixed sleeve 3 caused by excessive screwing.

[0030] In this embodiment, a method for installing the side tooth structure of an excavator bucket is provided, including: The bottom of the side plate 1 is fixed to the bucket. Fixing sleeves 3 are installed in several side plate through holes 5 on the upper part of the side plate 1. The side teeth 2 are snapped into the upper part of the side plate 1 through the groove structure at the bottom, so that each through hole of the side teeth 2 is respectively set to correspond to the through hole 5 of the side plate. The two studs 4 are symmetrically passed through the through holes of the side teeth 2 and then threadedly connected to the fixing sleeve 3, with the opposite ends of the two studs 4 abutting each other.

[0031] The installation method involves pre-installing a fixing sleeve 3 on the side plate 1, engaging the side teeth 2 with the side plate 1, and symmetrically tightening the two studs 4. After tightening, the screws are locked in place and interlocked. This process enables a single person to perform efficient disassembly and assembly operations in a short time, without any impact load throughout the process, protecting the thread accuracy, and supporting multiple repeated disassembly and assembly operations.

[0032] In a second aspect, an excavator is provided, including the excavator bucket side tooth structure described above.

[0033] The side tooth 2 structure provided by this utility model improves the replacement efficiency of the side tooth 2, thereby further increasing the effective working time of a single excavator.

[0034] This utility model provides an excavator bucket side tooth structure and excavator, which solves the problem of difficult assembly and disassembly of traditional side tooth 2 structures. A stable base is formed by pre-embedded side plate through holes 5 in the fixing sleeve 3, and quick snap-fit ​​positioning is achieved by combining the groove structure of the side tooth 2. Two studs 4 are symmetrically screwed into the internal thread of the fixing sleeve 3, allowing for assembly and disassembly with only an Allen wrench. No hammering or gas cutting is required throughout the process, significantly improving maintenance efficiency and safety. Two studs 4 are symmetrically screwed into the fixing sleeve 3 and precisely abut against each other to form a rigid mechanical stop structure, which completely eliminates axial movement caused by vibration. Furthermore, the outer wall of the fixing sleeve 3 and the through hole 5 of the side plate are in zero-clearance fit to prevent the fixing sleeve 3 from moving slightly in the hole. The through hole of the side tooth 2 and the inner wall of the fixing sleeve 3 are connected by the two studs 4 with equal diameter guide fit to prevent thread damage caused by off-center load. The axial length of the fixed sleeve 3 is consistent with the thickness of the side plate 1, realizing the full cross-section transmission of load. As an independent consumable part, the fixed sleeve 3 has extremely low replacement cost and protects the base of the side plate 1. It avoids the problem of traditional solutions with threads on the side plate 1 and side teeth 2, which are easy to damage and require replacement of the side plate 1 and side teeth 2 after damage. The length of the stud 4 matches the thickness of the side teeth 2, ensuring that the symmetrical locking position of the double stud 4 is centered, while preventing thread failure caused by over-tightening. It is adapted to the thickness of the side plate 1 to ensure the connection effect.

[0035] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. An excavator bucket side tooth structure, characterized by, The device includes a side plate and side teeth. The bottom of the side plate is fixed to the bucket. The upper part of the side plate has several through holes along its thickness direction. Each of the several through holes has a cylindrical fixing sleeve. The inner wall of the fixing sleeve has an internal thread structure. The bottom of the side teeth has a groove structure. The side teeth are engaged with the side plate through the groove structure. The lower part of the side teeth has several side tooth through holes symmetrically arranged along the thickness direction of the side teeth, passing through the groove structure. Each side tooth through hole corresponds to a through hole in the side plate. Two studs are arranged opposite each other at both ends of each side tooth through hole. The two studs symmetrically pass through the side tooth through holes and are threadedly connected to the fixing sleeves. The axial lengths of the two studs are the same, and the length of the threaded section of the two studs is equal to half the length of the internal thread structure of the fixing sleeve.

2. A sidecut structure for an excavator bucket as defined in claim 1, wherein The bottom of the side plate is configured as a straight-edged structure and is fixedly connected to the bucket. The top of the side plate is provided with a positioning bevel structure that abuts against the side of the side teeth.

3. A sidecut structure for an excavator bucket as defined in claim 1 wherein, One end of the side tooth connected to the side plate has a concave arc-shaped structure, and both ends of the arc-shaped structure have protruding structures, with side tooth through holes provided on the protruding structures.

4. A sidecut structure for an excavator bucket as defined in claim 1 wherein, The end of the stud away from the threaded section has an internal hexagonal groove structure.

5. An excavator bucket sidecut structure as claimed in claim 1, wherein, The plurality of side plate through holes are respectively set at certain intervals along the length direction of the side plate.

6. An excavator bucket sidecut structure as claimed in claim 1, wherein, The diameter of the through hole in the side plate is equal to the diameter of the outer wall of the fixing sleeve.

7. An excavator bucket sidecut structure as claimed in claim 6, wherein, The diameter of the outer wall of the fixing sleeve is greater than the diameter of the side tooth through hole, and the diameter of the side tooth through hole is equal to the inner wall diameter of the fixing sleeve.

8. An excavator bucket sidecut structure as claimed in claim 1, wherein, The axial length of the fixing sleeve is the same as the thickness of the side plate.

9. An excavator bucket sidecut structure as claimed in claim 8, wherein, The sum of the axial lengths of the two studs is consistent with the thickness of the lower part of the side teeth.

10. An excavator characterized by comprising: Includes an excavator bucket side tooth structure as described in any one of claims 1-9.

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