A combination excavator tooth

Abstract

The utility model discloses a combined excavator bucket tooth, including tooth seat and tooth tip, the front and back of tooth seat are all convex and have the rib that extends to tooth tip along its length direction, the both sides of rib are respectively formed with a recess between the two side walls of tooth seat, the width of rib reduces from tooth seat to the direction of tooth tip, and the depth of recess is gradually small from tooth seat to the direction of tooth tip, to make tooth tip form three along tooth tip width direction interval distribution's sharp head part. The recess of both sides of the bucket tooth of the utility model forms wide contact surface, reduces the soil resistance, is favorable to efficient shovel loading and contains earthwork, and the operation is smooth, and the rib set up at the front and back enhances the overall strength and rigidity of tooth tip, can bear huge impact load, and the main tip of rib front end can concentrate stress, effectively break the rock, prevent tooth tip from breaking, and three independent sharp and interval distribution's sharp head part constitutes an efficient puncture structure and stabs into hard ice layer and pries the ice layer, and the bucket tooth can adapt to different working conditions, and the versatility is strong.

Description

Technical Field

[0001] This utility model relates to the field of excavator parts technology, specifically a combined excavator bucket tooth. Background Technology

[0002] Excavator bucket teeth are key and easily worn components of the excavator's working device, and their performance directly affects the excavator's working efficiency and operating costs. Different working conditions place different performance requirements on the bucket teeth: when excavating earth, the bucket teeth need to have good cutting and loading capabilities; when excavating rock, the bucket teeth need to have extremely high impact resistance and abrasion resistance; and when excavating special media such as ice, the bucket teeth need to have strong piercing and crushing capabilities.

[0003] Conventional bucket teeth have limited functions: earthmoving bucket teeth have relatively blunt tips, focusing on wear resistance and soil removal capacity, but they are difficult to cut effectively when facing rocks or ice, are prone to slipping and severe wear; rock bucket teeth usually have reinforcing ribs or protrusions added to the tips to enhance strength, focusing on impact resistance, but they have high resistance and low efficiency in earthmoving operations, and their piercing efficiency in ice is also not high; ice digging bucket teeth require special tips, which can effectively break ice, but their complex structure and high cost make them unsuitable for conventional earthmoving or rock excavation, and their versatility is poor.

[0004] Therefore, in actual construction, frequent replacement of bucket teeth is required to adapt to different working conditions, increasing downtime, which is not only time-consuming and labor-intensive, reducing work efficiency, but also increasing equipment maintenance and construction costs. Therefore, there is an urgent need for a multi-functional bucket tooth that can simultaneously adapt to multiple working conditions such as earthmoving, rock, and ice surface operations. Utility Model Content

[0005] The purpose of this invention is to provide a combined excavator bucket tooth to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a combined excavator bucket tooth, including a tooth base and a tooth tip. The front and back sides of the tooth base are provided with ribs extending to the tooth tip along their length direction. A groove is formed between each side of the rib and the side wall of the tooth base. The width of the rib decreases from the tooth base to the tooth tip, and the depth of the groove gradually decreases from the tooth base to the tooth tip, so that the tooth tip forms three pointed heads spaced apart along the width direction of the tooth tip.

[0007] Furthermore, the tooth base and the tooth tip are integrally formed, and the tooth base has a gradient structure, with the cross-section gradually narrowing from the bottom of the tooth base to the tooth tip;

[0008] Furthermore, the cross-sectional shape of the rib is one of trapezoidal, triangular, or arc-shaped.

[0009] Furthermore, the groove has an arc-shaped cross-section, and the bottom of the groove transitions to the sidewall of the rib through a rounded corner.

[0010] Furthermore, the pointed head is a conical or prismatic piercing structure, symmetrically arranged with the central axis of the rib as the axis of symmetry.

[0011] Furthermore, countersunk holes are provided on the outer walls on both sides of the bottom of the tooth holder, and a connecting cavity extending along its length is provided inside the tooth holder, with the countersunk holes communicating with the connecting cavity.

[0012] Furthermore, the connecting cavity extends from the bottom of the tooth base towards the tooth tip.

[0013] Furthermore, the depth of the connecting cavity is 2 / 3 to 4 / 5 of the height of the tooth seat.

[0014] Furthermore, the connecting cavity has a gradually narrowing structure, with the cross-section gradually narrowing from the tooth base to the tooth tip.

[0015] Furthermore, the material of the bucket teeth is high-strength wear-resistant cast steel.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The grooves on both sides of the bucket teeth of this utility model form a cutting edge similar to that of traditional earthmoving bucket teeth, creating a wide contact surface, reducing soil resistance, facilitating efficient shoveling and loading of earth, and ensuring smooth operation. The convex ribs on the front and back enhance the overall strength and rigidity of the tooth tip, enabling it to withstand huge impact loads. The main tip at the front end of the convex rib can concentrate stress, effectively breaking rocks and preventing the tooth tip from cracking. The three independent, sharp, and spaced-apart tips form an efficient piercing structure that penetrates hard ice layers and pries them apart, avoiding the problem of a single cutting edge slipping on the ice surface. This bucket tooth can adapt to different working conditions and has strong versatility.

[0018] 2. By setting the depth of the connecting cavity close to the height of the tooth base, the overall wall thickness of the bucket tooth casting or forging is more uniform during forming. This avoids hot spots caused by excessive local wall thickness, significantly reduces casting defects such as shrinkage cavities and porosity, makes the bucket teeth easier to form, improves yield and internal quality, and ensures that the uniform wall thickness structure results in a more uniform temperature field distribution and consistent cooling rate in subsequent heat treatment, especially during quenching. This leads to better hardenability and avoids the risk of cracking and deformation caused by uneven metallographic structure due to local overheating or undercooling. It also ensures uniform and stable hardness and mechanical properties of the bucket teeth, ultimately giving them high and uniform hardness and toughness, thus improving the overall reliability and service life of the product. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the combined excavator bucket tooth structure of this utility model;

[0020] Figure 2 This is a schematic diagram of another view of the combined excavator bucket teeth of this utility model;

[0021] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0022] In the figure, 1-tooth seat; 2-tooth tip; 3-convex rib; 4-groove; 5-pointed head; 6-counterhead; 7-connecting cavity. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1-2 As shown, this embodiment provides a combined excavator bucket tooth, including a tooth base 1 and a tooth tip 2. The tooth base 1 and tooth tip 2 are integrally cast or forged. The entire bucket tooth is made of high-strength wear-resistant cast steel (such as ZGMn13 series) through precision casting, ensuring overall strength and wear resistance. The tooth base 1 has a gradient structure, with its cross-section gradually narrowing from its bottom to the tooth tip 2. This streamlined design helps reduce digging resistance.

[0025] The front and back sides of the tooth tip 2 are both provided with protruding ribs 3 along their length direction. The protruding ribs 3 extend from the tooth base 1 to the top of the tooth tip 2. The width of the protruding ribs 3 gradually decreases from the tooth base 1 to the tooth tip 2. The cross-sectional shape of the protruding ribs 3 is one of trapezoid, triangle or arc. In this embodiment, an arc shape is used.

[0026] A groove 4 is formed between each side of the rib 3 and the side walls of the tooth base 1. The cross-section of the groove 4 is arc-shaped, and the bottom of the groove 4 and the side wall of the rib 3 are transitioned by a rounded corner. The depth of the groove 4 gradually decreases from the tooth base 1 to the tooth tip 2, so that the tooth tip 2 forms three pointed heads 5 distributed at intervals along the width direction. In this embodiment, the one located at the front end of the rib 3 is the main tip, and the ones located at the front ends of both sides of the tooth base 1 are the side tips. The three pointed heads 5 are symmetrically arranged with the central axis of the rib 3 as the axis of symmetry.

[0027] like Figure 3As shown, countersunk holes 6 are provided on the outer walls of both sides of the bottom of the tooth base 1. A connecting cavity 7 extending along its length is provided inside the tooth base 1. The countersunk holes 6 communicate with the connecting cavity 7. The connecting cavity 7 itself also has a gradually narrowing structure, with the cross-section gradually narrowing from its inlet to the inside, which can fit tightly with the fitting of the tooth base 1, ensuring a stable connection and effectively dispersing stress. However, the traditional bucket tooth structure design is unreasonable. To ensure connection strength, a thick-walled structure is used, and the depth of the connecting cavity is too shallow, resulting in uneven thickness of the bucket tooth. The bottom and top parts are thinner, and the middle part is thicker, which can easily lead to defects such as shrinkage cavities and porosity in castings or forgings. Moreover, the temperature field imbalance during quenching leads to uneven cooling, which can easily cause deformation and cracks, affecting product performance. In this embodiment, the connecting cavity 7 extends from the bottom of the tooth base 1 towards the tooth tip 2, and its depth is set to 2 / 3 to 4 / 5 of the height of the tooth base 1, close to the height of the tooth base 1, so that the wall thickness of the bucket tooth is basically consistent, avoiding the sudden change in wall thickness in the middle caused by the shallow connecting cavity in traditional bucket teeth. Uniform wall thickness avoids hot spots caused by excessive local wall thickness, significantly reducing casting defects such as shrinkage cavities and porosity, making bucket teeth easier to form, improving casting yield and internal quality. The uniform wall thickness structure ensures a uniform temperature field distribution and consistent cooling rate throughout the bucket teeth during subsequent heat treatment, especially quenching, resulting in better hardenability. It also avoids the risk of cracking and deformation caused by uneven metallographic structure due to local overheating or undercooling, ensuring uniform and stable hardness and mechanical properties of the bucket teeth. The final bucket teeth possess high and uniform hardness and toughness, improving the overall reliability and service life of the product.

[0028] During installation, the bucket teeth are secured to the bucket by bolts passing through the countersunk holes and into the connecting cavity. When performing earthmoving operations, the bucket teeth rely on the cutting edges formed by the grooves 4 on both sides to operate, using the grooves 4 to guide soil flow, cut into the soil and accommodate a large amount of material to achieve loading. When digging rocks, the convex ribs 3 on the front and back serve as the main load-bearing structure, enhancing the bending and impact resistance of the tooth tips for impact crushing. When performing ice digging operations, the three pointed heads 5 act on the ice surface simultaneously, and the three pointed heads 5 pry and break the ice, achieving seamless switching between multiple working conditions.

[0029] The grooves on both sides of the bucket teeth of this invention form a cutting edge similar to that of traditional earthmoving bucket teeth, creating a wide contact surface, reducing soil resistance, facilitating efficient shoveling and loading of earth, and ensuring smooth operation. The convex ribs on the front and back enhance the overall strength and rigidity of the tooth tip, enabling it to withstand enormous impact loads. The main tip at the front of the rib concentrates stress, effectively breaking rocks and preventing tooth tip breakage. Three independent, sharp, and spaced-apart tips form a highly efficient piercing structure that penetrates hard ice layers and pries them apart, avoiding the problem of a single cutting edge slipping on ice. This bucket tooth can adapt to different working conditions and has strong versatility; the depth of the connecting cavity is close to the height of the tooth base. This process results in a more uniform overall wall thickness for bucket teeth castings or forgings during forming, avoiding hot spots caused by excessive local wall thickness. It significantly reduces casting defects such as shrinkage cavities and porosity, making bucket teeth easier to form, improving yield and internal quality. Moreover, the uniform wall thickness structure ensures a more uniform temperature field distribution and consistent cooling rate throughout the bucket teeth during subsequent heat treatment, especially quenching. This leads to better hardenability and avoids the risk of cracking and deformation caused by uneven metallographic structure due to local overheating or overcooling. It also ensures uniform and stable hardness and mechanical properties of the bucket teeth, ultimately resulting in high and uniform hardness and toughness, thus improving the overall reliability and service life of the product.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A combined excavator bucket tooth, comprising a tooth base and a tooth tip, characterized in that: The front and back sides of the tooth base are both provided with ribs extending to the tooth tip along their length. A groove is formed between each side of the rib and the side wall of the tooth base. The width of the rib decreases from the tooth base to the tooth tip, and the depth of the groove gradually decreases from the tooth base to the tooth tip, so that the tooth tip forms three pointed heads that are spaced apart along the width direction of the tooth tip.

2. The combined excavator bucket teeth according to claim 1, characterized in that: The tooth base and tooth tip are integrally formed, and the tooth base has a gradient structure, with the cross section gradually narrowing from the bottom of the tooth base to the tooth tip.

3. The combined excavator bucket teeth according to claim 1, characterized in that: The cross-sectional shape of the rib is one of trapezoidal, triangular, or arc-shaped.

4. The combined excavator bucket teeth according to claim 1, characterized in that: The groove has an arc-shaped cross-section, and the bottom of the groove and the sidewall of the rib are connected by a rounded corner.

5. The combined excavator bucket teeth according to claim 1, characterized in that: The pointed head is a conical or sharp-edged piercing structure, symmetrically arranged with the central axis of the rib as the axis of symmetry.

6. The combined excavator bucket teeth according to claim 1, characterized in that: The tooth base has countersunk holes on both sides of its outer wall, and a connecting cavity extending along its length is provided inside the tooth base. The countersunk holes are connected to the connecting cavity.

7. The combined excavator bucket teeth according to claim 6, characterized in that: The connecting cavity extends from the bottom of the tooth base towards the tooth tip.

8. The combined excavator bucket teeth according to claim 6 or 7, characterized in that: The depth of the connecting cavity is 2 / 3 to 4 / 5 of the height of the tooth seat.

9. The combined excavator bucket teeth according to claim 8, characterized in that: The connecting cavity has a gradually narrowing structure, with the cross-section gradually narrowing from the tooth base to the tooth tip.

10. The combined excavator bucket teeth according to claim 1, characterized in that: The bucket teeth are made of high-strength wear-resistant cast steel.

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