Bucket tooth structure of loading machine

Abstract

The utility model discloses a loader bucket tooth structure which comprises a working part and a mounting part, the whole working part is wedge-shaped, the tooth tip of the working part is an arc surface, the lower part of the working part is provided with an arc-shaped part protruding downwards, and the upper part of the working part is provided with a plurality of arc-shaped reinforcing ribs protruding upwards far away from the tooth tip. At least one transverse reinforcing rib is arranged between every two adjacent arc-shaped reinforcing ribs; the mounting part comprises a lower plate and an upper plate, the upper part of the lower plate is provided with a first weight reduction groove extending to the casting fillet, the first weight reduction groove enables the periphery of the upper part of the lower plate to form a peripheral reinforcing rib, the lower part of the upper plate is provided with a second weight reduction groove extending to the casting fillet, and the second weight reduction groove enables the periphery of the upper part of the upper plate to form a peripheral reinforcing rib. According to the utility model, the influence on the position of the upper front bolt hole is relieved, and the risk of fracture is greatly reduced; the strength of the bucket teeth is improved; the span size of the upper plate and the lower plate of the mounting part is ensured to be within a tiny variation range, local deformation is avoided, and the proportion of follow-up correction of the bucket tooth is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bucket teeth, in particular to a bucket tooth structure for a loader. Background Art

[0002] Loaders are earthwork construction machinery widely used in construction projects such as highways, railways, buildings, hydropower, ports, and mines. They are mainly used to shovel bulk materials such as soil, sand, lime, and coal, and can also do light shoveling operations on ore and hard soil. Bucket teeth are bolted to the main blade welded on the loader bucket and are vulnerable parts on the loader. There are two main forms of bucket tooth failure: wear and fracture. To slow down bucket tooth failure, generally starting from the material and heat treatment of bucket teeth and the structure of bucket teeth, bucket tooth material and heat treatment process have been experimentally improved, but the bucket tooth structure has not changed much.

[0003] The working part of the bucket tooth tip is basically a right-angle trapezoid. A weight-reducing groove is dug in the middle or on both sides of the trapezoidal slope, and the remaining part of the weight-reducing groove is dug out as reinforcement ribs. During the loader shoveling process, the forces acting on the upper slope of the bucket tooth and the ground are completely transmitted to the front bolt hole position of the upper part of the bucket tooth, so this position has always been a high-incidence area for fracture failure. Although reinforcement ribs are set at the tip of the bucket tooth, the strength of the bucket tooth is improved, but the improvement is not large. A weight-reducing groove is often set between the upper plate and the lower plate of the bucket tooth, but the weight-reducing groove is often designed only considering the structural strength, ignoring the uneven thickness in production, the foaming and drying of the beads, the drying of the yellow mold, and the cooling after pouring. All of these may cause the temperature difference and the inconsistent shrinkage direction, resulting in deformation of the web, very uneven gear spacing, or the gear spacing size exceeds the lower limit of the tolerance by a large distance, and the matching blade still cannot be installed.

[0004] The patent with the authorization announcement number CN215166036U discloses a bucket tooth for a loader bucket, comprising: a front end tooth tip portion and a rear end mounting portion, wherein: the rear end mounting portion is connected to the rear end of the front end tooth tip portion. The front end tooth tip portion is a wedge-shaped structure as a whole, and the upper surface of the front end tooth tip portion from the tooth tip to the rear end is a first arc surface area and a straight surface area, the first arc surface area is an upwardly convex arc surface, the straight surface area is smoothly connected to the first arc surface area, and an arc groove is provided on the straight surface area, and two through-groove-type weight-reducing grooves are provided on the upper and lower plates of the mounting portion, which may cause problems such as web deformation and uneven gear spacing. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a loader bucket tooth structure, which alleviates the influence on the position of the upper front bolt hole and greatly reduces the risk of breakage; increases the strength of the bucket tooth; ensures that the spacing dimensions of the upper and lower plates of the mounting part are guaranteed to be within a small variation range without local deformation, reduces the proportion of subsequent correction of the bucket tooth, and can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a loader bucket tooth structure, including a working part and a mounting part, the working part is wedge-shaped as a whole, the tooth tip of the working part is an arc surface, the lower part of the working part is provided with an arc-shaped part protruding downward, the arc-shaped part transitions with the tooth tip arc, the upper part of the working part away from the tooth tip is provided with a plurality of arc-shaped reinforcement ribs protruding upward, and at least one transverse reinforcement rib is provided between two adjacent arc-shaped reinforcement ribs; the mounting part includes a lower plate and an upper plate, a mounting groove matching with a knife plate is provided between the lower plate and the upper plate, a cast fillet is provided on one side of the mounting groove, a weight-reducing groove 1 extending to the cast fillet is provided on the upper part of the lower plate, the weight-reducing groove 1 forms a peripheral reinforcement rib around the upper part of the lower plate, and a weight-reducing groove 2 extending to the cast fillet is provided on the lower part of the upper plate, the weight-reducing groove 2 forms a peripheral reinforcement rib around the upper part of the upper plate.

[0007] Preferably, the depth of the weight-reducing groove 1 is 3-5 mm, and a boss 1 is provided at the position corresponding to the countersunk hole in the weight-reducing groove 1, and the boss 1 is 1-3 mm lower than the upper surface of the lower plate.

[0008] Preferably, the depth of the second weight-reducing groove is 3-5 mm, and a second boss is provided at the position of the second weight-reducing groove corresponding to the bolt hole, and the second boss is 1-3 mm higher than the lower surface of the upper plate.

[0009] Preferably, both rear sides of the working part are provided with side weight-reducing grooves.

[0010] Preferably, the cross-section of the transverse reinforcing rib is arc-shaped.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The upper and lower sides of the working part are both arc structures. Through the arc structure, when the bucket teeth are working, part of the pressure and shear force still acts on the front bolt hole position of the upper part of the bucket teeth, and part of the force is dispersed on the upper part of the arc. Moreover, as the loader bucket arm moves, the direction of the dispersed force on the bucket teeth also changes, which greatly alleviates the impact on the upper front bolt hole position and greatly reduces the risk of breakage;

[0013] 2. Multiple arc-shaped reinforcement ribs and transverse reinforcement ribs are set on the upper side of the working part, which basically does not increase the working resistance when the bucket teeth are working, greatly increasing the strength of the bucket teeth;

[0014] 3. Weight-reducing grooves are set on both the upper and lower plates of the bucket teeth. The weight-reducing grooves are changed from the original two through-weight-reducing structures on the upper and lower plates to the middle of the upper and lower plates. The area around the weight-reducing grooves is used as a reinforcing rib to ensure the strength of the web. In addition, there is no partition in this area, and the shrinkage is consistent after pouring, which makes it easy to ensure the smoothness of the web. The gear spacing size can be guaranteed to be within a smaller range, and there is no local deformation, which reduces the proportion of subsequent correction of the bucket teeth.

[0015] 4. The front end between the upper and lower plates of the bucket teeth is changed from a straight surface to an arc, so that the stress is evenly dispersed and the risk of cracks in this area is reduced; a weight-reducing groove is set on the side of the bucket tooth, which can reduce the resistance when the bucket tooth is working, and increase the strength of this part while reducing the weight of the bucket tooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 The local structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 4 The local structure of the utility model is shown in FIG. Figure 2 .

[0020] In the figure: 1 working part, 1.1 arcuate part, 1.2 tooth tip, 1.3 side weight reducing groove, 1.4 transverse reinforcing rib, 1.5 arcuate reinforcing rib, 2 mounting part, 2.1 lower plate, 2.11 weight reducing groove 1, 2.12 boss 1, 2.2 upper plate, 2.21 weight reducing groove 2, 2.22 boss 2. DETAILED DESCRIPTION

[0021] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present application for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction.

[0022] See also Figure 1-4 The utility model provides a technical solution: a bucket tooth structure for a loader, comprising a working part 1 and a mounting part 2, the working part 1 being wedge-shaped as a whole, the tooth tip 1.2 of the working part 1 being an arc surface, the lower part of the working part 1 being provided with an arc-shaped part 1.1 protruding downward, the arc-shaped part 1.1 and the tooth tip 1.2 being in an arc transition, the upper part of the working part 1 being provided with a plurality of arc-shaped reinforcing ribs 1.5 protruding upward away from the tooth tip 1.2, at least one transverse reinforcing rib 1.4 being provided between two adjacent arc-shaped reinforcing ribs 1.5;

[0023] The lower part of the working part 1 is provided with an arc-shaped part 1.1, which is convex downward, and the upper part of the working part 1 is provided with a plurality of arc-shaped reinforcing ribs 1.5, which are convex upward, that is, the upper and lower contour lines of the working part 1 are both large arc structures. Through the large arc structure, when the bucket tooth is working, the pressure and shear force it receives, in addition to a part still acting on the position of the upper front bolt hole of the bucket tooth, a part of the force is dispersed in the upper part of the arc, and as the bucket arm of the loader moves, the direction of the dispersed force on the bucket tooth also changes, which greatly alleviates the influence on the position of the upper front bolt hole and greatly reduces the risk of breakage;

[0024] Moreover, by setting a plurality of parallel arc-shaped reinforcing ribs 1.5 (if the width of the bucket tooth increases, the number of the parallel arc-shaped reinforcing ribs can be increased accordingly), the width of each reinforcing rib is reduced from the original 15mm to 10mm. The original bucket tooth has a weight-reducing groove dug on the upper working surface, and the periphery of the weight-reducing groove can be used as a reinforcing rib, but there is a step structure between the weight-reducing groove and the working surface, which has a poor effect on strength enhancement. In addition, a transverse reinforcing rib 1.4 is set, and the transverse reinforcing rib 1.4 is a small semicircular arc structure, which basically does not increase the working resistance during operation, and greatly increases the strength of the bucket tooth;

[0025] The mounting portion 2 comprises a lower plate 2.1 and an upper plate 2.2, wherein a mounting groove cooperating with the blade is provided between the lower plate 2.1 and the upper plate 2.2, a casting fillet is provided on one side of the mounting groove, a weight-reducing groove 1 2.11 extending to the casting fillet is provided on the upper portion of the lower plate 2.1, and the weight-reducing groove 1 2.11 forms a peripheral reinforcement rib around the upper portion of the lower plate 2.1, and a weight-reducing groove 2 2.21 extending to the casting fillet is provided on the lower portion of the upper plate 2.2, and the weight-reducing groove 2 2.21 forms a peripheral reinforcement rib around the upper portion of the upper plate 2.2;

[0026] A weight-reducing groove is set between the upper plate and the lower plate of the bucket tooth. The weight-reducing groove is changed from the original two through-weight-reducing structures on the upper and lower plates to one weight-reducing groove in the middle of the upper plate and the lower plate. This can ensure the strength of the upper plate and the lower plate, and there is no partition in this area. The shrinkage is consistent after pouring, which makes it easy to ensure the smoothness of the web. The gear spacing size can be guaranteed within a small variation range, and there is no local deformation, which reduces the proportion of subsequent correction of the bucket tooth.

[0027] Specifically, the depth of the weight-reducing groove 2.11 is 3-5 mm, and a boss 2.12 is provided at the corresponding countersunk position in the weight-reducing groove 2.11, and the boss 2.12 is 1-3 mm lower than the upper surface of the lower plate 2.1; the depth of the weight-reducing groove 2.21 is 3-5 mm, and a boss 2.22 is provided at the corresponding bolt hole position in the weight-reducing groove 2.21, and the boss 2.22 is 1-3 mm higher than the lower surface of the upper plate 2.2. By providing the boss 1 2.12 and the boss 2 2.22, the structural strength can be increased, and the contact area between the bolt and the upper plate and the lower plate of the bucket tooth can be enhanced;

[0028] In addition, both rear sides of the working part 1 are provided with side weight-reducing grooves 1.3, which can reduce the resistance when the bucket teeth are working, and increase the strength of this part while reducing the weight of the bucket teeth; the cross section of the transverse reinforcing ribs 1.4 is arc-shaped.

[0029] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and it is intended to include all changes that fall within the meaning and scope of equivalent elements in the content of the present invention.

Claims

1. A bucket tooth structure for a loader, comprising a working portion (1) and a mounting portion (2), characterized in that: The working portion (1) is wedge-shaped as a whole, the tooth tip (1.2) of the working portion (1) is an arc surface, the lower portion of the working portion (1) is provided with an arc portion (1.1) protruding downward, the arc portion (1.1) and the tooth tip (1.2) are in arc transition, the upper portion of the working portion (1) is provided with a plurality of arc reinforcement ribs (1.5) protruding upward away from the tooth tip (1.2), and at least one transverse reinforcement rib (1.4) is provided between two adjacent arc reinforcement ribs (1.5); the mounting portion (2) comprises a lower plate (2.1) and an upper plate (2.2), a mounting groove cooperating with the knife plate is provided between the lower plate (2.1) and the upper plate (2.2), a cast fillet is provided on one side of the mounting groove, a weight reduction groove 1 (2.11) extending to the cast fillet is provided on the upper part of the lower plate (2.1), and the weight reduction groove 1 (2.11) forms a peripheral reinforcement rib around the upper part of the lower plate (2.1), and a weight reduction groove 2 (2.21) extending to the cast fillet is provided on the lower part of the upper plate (2.2), and the weight reduction groove 2 (2.21) forms a peripheral reinforcement rib around the upper part of the upper plate (2.2).

2. A loader bucket tooth structure according to claim 1, characterized in that: The depth of the weight-reducing groove 1 (2.11) is 3-5 mm, and a boss 1 (2.12) is provided at a position corresponding to the countersunk hole in the weight-reducing groove 1 (2.11), and the boss 1 (2.12) is 1-3 mm lower than the upper surface of the lower plate (2.1).

3. A loader bucket tooth structure according to claim 1, characterized in that: The depth of the second weight-reducing groove (2.21) is 3-5 mm, and a second boss (2.22) is provided in the second weight-reducing groove (2.21) at a position corresponding to the bolt hole, and the second boss (2.22) is 1-3 mm higher than the lower surface of the upper plate (2.2).

4. The bucket tooth structure of a loader according to claim 1, characterized in that: Both rear side surfaces of the working part (1) are provided with side weight-reducing grooves (1.3).

5. The bucket tooth structure of a loader according to claim 1, characterized in that: The cross section of the transverse reinforcing rib (1.4) is arc-shaped.

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