Excavator bucket rod

Abstract

The utility model provides an excavator bucket rod which comprises a bucket rod main body, a first hydraulic cylinder mounting part, a second hydraulic cylinder mounting part, a big arm mounting part, a bucket transmission mechanism mounting part, a bucket mounting part and a reinforcing structure, the reinforcing structure is arranged on the bucket rod main body, and at least part of the reinforcing structure is connected with one or more of the first hydraulic cylinder mounting part, the second hydraulic cylinder mounting part, the large arm mounting part, the bucket transmission mechanism mounting part and the bucket mounting part; and the bucket rod main body, the first hydraulic cylinder mounting part, the second hydraulic cylinder mounting part, the big arm mounting part, the bucket transmission mechanism mounting part, the bucket mounting part and the reinforcing structure are integrally cast and formed. The excavator bucket rod is of an integrated casting forming structure, on the basis that the strength requirement is met, the manufacturing process and period are shortened, cost is reduced, and efficiency is improved. The reinforcing structure can play a role in reinforcing the structure of the bucket rod main body and can also play a role in reinforcing the connecting parts of the bucket rod and other parts.

Description

Technical Field

[0001] The utility model relates to the technical field of excavators, in particular to an excavator bucket arm. Background Art

[0002] An excavator, also known as a backhoe, is an earth-moving machine that uses its bucket to dig up materials above or below the surface and load them onto transport vehicles or unload them into a stockpile. Excavators primarily excavate soil, coal, silt, and pre-loosened soil and rock. Based on their size, excavators can be categorized as large, medium, small, and mini excavators. Excavators of different sizes are suitable for different operating environments.

[0003] Currently, mini excavator booms are manufactured using a conventional process: plates and profiles (such as bushings and round steel) are first prepared and processed according to individual drawings. The components are then welded together according to welding diagrams, and finally machined on a lathe to the required dimensions. This conventional boom structure results in a lengthy production process, high costs, and low efficiency. Utility Model Content

[0004] In view of this, an embodiment of the present utility model provides an excavator boom to eliminate or improve one or more defects in the prior art.

[0005] The utility model provides an excavator bucket arm, comprising: a bucket arm body, a first hydraulic cylinder mounting portion, a second hydraulic cylinder mounting portion, a large arm mounting portion, a bucket transmission mechanism mounting portion, a bucket mounting portion and a reinforcement structure;

[0006] The first hydraulic cylinder mounting portion, the second hydraulic cylinder mounting portion and the boom mounting portion are all arranged at one end of the boom body, and the first hydraulic cylinder mounting portion, the second hydraulic cylinder mounting portion and the boom mounting portion are arranged in a triangle and are all located at the edge of the boom body;

[0007] The bucket transmission mechanism mounting portion and the bucket mounting portion are both arranged at the other end of the boom body and along the length direction of the boom body;

[0008] The reinforcement structure is provided on the boom body, and at least a portion of the reinforcement structure is connected to one or more of the first hydraulic cylinder mounting portion, the second hydraulic cylinder mounting portion, the boom mounting portion, the bucket transmission mechanism mounting portion, and the bucket mounting portion;

[0009] The boom body, the first hydraulic cylinder mounting portion, the second hydraulic cylinder mounting portion, the boom mounting portion, the bucket transmission mechanism mounting portion, the bucket mounting portion and the reinforcement structure are integrally cast.

[0010] In some embodiments of the present invention, the boom body is a substantially triangular structure with two sides sharing the same portion, and the boom body includes a vertical plate, a first top plate, a second top plate, a first bottom plate, and a second bottom plate;

[0011] The first top plate, the second top plate, the first bottom plate and the second bottom plate are fixedly arranged in sequence along the outer contour of the vertical plate, the plane where the vertical plate is located intersects with the planes where the first top plate, the second top plate, the first bottom plate and the second bottom plate are located, and the vertical plate is located in the middle of the first top plate, the second top plate, the first bottom plate and the second bottom plate;

[0012] The first hydraulic cylinder mounting portion is provided at a junction of the first top plate and the second top plate;

[0013] The second hydraulic cylinder mounting portion is provided at a junction of the second top plate and the first bottom plate;

[0014] The upper arm mounting portion is provided at the junction of the first base plate and the second base plate;

[0015] The bucket mounting portion is provided at a junction of the second bottom plate and the first top plate;

[0016] The bucket transmission mechanism mounting portion is disposed between the second bottom plate and the first top plate.

[0017] In some embodiments of the present invention, one end of the first top plate close to the first hydraulic cylinder mounting portion is an arc-shaped structure protruding toward one side of the vertical plate, the middle part of the first top plate and the end close to the bucket mounting portion are straight structures, and the width of the arc-shaped structure gradually decreases along the direction pointing to the first hydraulic cylinder mounting portion.

[0018] In some embodiments of the present invention, both the second top plate and the second bottom plate are flat structures.

[0019] In some embodiments of the present invention, the first bottom plate is an arc-shaped structure that protrudes toward one side of the vertical plate, and the width of the first bottom plate gradually decreases along the direction toward the second hydraulic cylinder mounting portion.

[0020] In some embodiments of the present invention, the first hydraulic cylinder mounting part, the second hydraulic cylinder mounting part, the boom mounting part, the bucket transmission mechanism mounting part and the bucket mounting part are all sleeve-type structures, and the axes of each of the sleeve-type structures are arranged parallel to each other, and the axes of each of the sleeve-type structures intersect with the plane where the vertical plate is located.

[0021] In some embodiments of the present invention, a bearing mounting step is provided in the sleeve-type structure; along the width direction of the second top plate, the first hydraulic cylinder mounting portion and the second hydraulic cylinder mounting portion extend from one side of the second top plate to the other side.

[0022] In some embodiments of the present invention, the reinforcing structure includes a rib structure fixedly arranged on one side or both sides of the vertical plate, the rib structure includes a first rib and a second rib, the first rib and the second rib are arranged parallel to each other, the two ends of the first rib are respectively connected to the position of the first top plate close to the bucket transmission mechanism mounting part and the position of the second bottom plate close to the bucket transmission mechanism mounting part, and the two ends of the second rib are respectively connected to the position of the first top plate close to the first hydraulic cylinder mounting part and the middle of the second bottom plate.

[0023] In some embodiments of the present invention, the rib structure further includes a third rib, a fourth rib, and a fifth rib;

[0024] Two ends of the third rib are respectively connected to the bucket transmission mechanism mounting portion and the bucket mounting portion;

[0025] Two ends of the fourth rib are respectively connected to the bucket transmission mechanism mounting portion and the first rib;

[0026] Both ends of the fifth rib are connected to the first hydraulic cylinder mounting portion and the boom mounting portion respectively.

[0027] In some embodiments of the present invention, the joints of the boom body, the sleeve-type structure, and the reinforcement structure are all provided with rounded transition connection structures.

[0028] The excavator boom of this utility model is an integrally cast structure. While meeting strength requirements, it also shortens the manufacturing process and cycle, reduces costs, and improves efficiency. The boom boasts high structural strength, high precision, light weight, and high reliability, improving the efficiency, operational accuracy, and reliability of mini excavators while reducing maintenance and transportation costs. The reinforcement structure strengthens the boom body and also strengthens the connections between the boom and other components.

[0029] Additional advantages, purposes, and features of the present invention will be partially set forth in the following description and will partially become apparent to those skilled in the art after studying the following or may be learned from practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically pointed out in the specification and drawings.

[0030] Those skilled in the art will understand that the purposes and advantages that can be achieved by the present invention are not limited to those specifically described above, and the above and other purposes that can be achieved by the present invention will be more clearly understood based on the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are intended to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are merely for the purpose of illustrating the principles of the present invention. To facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may be larger than other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0032] Figure 1 It is a structural schematic diagram of an excavator bucket arm in one embodiment of the utility model.

[0033] Figure 2 This is a structural schematic diagram of the excavator bucket arm from another perspective in one embodiment of the present utility model.

[0034] Figure 3 It is a structural diagram of an excavator bucket arm in the prior art.

[0035] Figure numerals: 1. boom body; 11. vertical plate; 12. first top plate; 13. second top plate; 14. first bottom plate; 15. second bottom plate; 2. first hydraulic cylinder mounting part; 3. second hydraulic cylinder mounting part; 4. boom mounting part; 5. bucket transmission mechanism mounting part; 6. bucket mounting part; 7. reinforcement structure; 71. first rib; 72. second rib; 73. third rib; 74. fourth rib; 75. fifth rib. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the schematic embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0037] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0038] It should be emphasized that the term "include / comprises" when used herein refers to the existence of features, elements, steps or components, but does not exclude the existence or addition of one or more other features, elements, steps or components.

[0039] It should also be noted that, unless otherwise specified, the term "connection" herein may refer not only to a direct connection but also to an indirect connection involving an intermediate.

[0040] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0041] In order to solve the problems of long manufacturing process and cycle, high cost and low efficiency of excavator boom in the prior art, an embodiment of the present utility model provides an excavator boom, which adopts an integral casting structure. On the basis of meeting the strength requirements, it shortens the manufacturing process and cycle, reduces costs and improves efficiency.

[0042] Reference Figure 1 and 2 An embodiment of the utility model provides an excavator boom, comprising: a boom body 1, a first hydraulic cylinder mounting portion 2, a second hydraulic cylinder mounting portion 3, a boom mounting portion 4, a bucket transmission mechanism mounting portion 5, a bucket mounting portion 6 and a reinforcement structure 7.

[0043] Among them, the first hydraulic cylinder mounting part 2, the second hydraulic cylinder mounting part 3 and the boom mounting part 4 are all arranged at one end of the bucket body 1. The first hydraulic cylinder mounting part 2, the second hydraulic cylinder mounting part 3 and the boom mounting part 4 are arranged in a triangle and are all located at the edge of the bucket body 1. The bucket transmission mechanism mounting part 5 and the bucket mounting part 6 are both arranged at the other end of the bucket body 1 and are arranged along the length direction of the bucket body 1.

[0044] The reinforcement structure 7 is provided on the boom body 1, and at least a portion of the reinforcement structure 7 is connected to one or more of the first hydraulic cylinder mounting portion 2, the second hydraulic cylinder mounting portion 3, the boom mounting portion 4, the bucket transmission mechanism mounting portion 5, and the bucket mounting portion 6. Optionally, the reinforcement structure 7 is connected to the first hydraulic cylinder mounting portion 2, the boom mounting portion 4, the bucket transmission mechanism mounting portion 5, and the bucket mounting portion 6. The boom body 1, the first hydraulic cylinder mounting portion 2, the second hydraulic cylinder mounting portion 3, the boom mounting portion 4, the bucket transmission mechanism mounting portion 5, the bucket mounting portion 6, and the reinforcement structure 7 are integrally cast.

[0045] Specifically, in the above embodiment, the excavator boom is integrally cast, which not only meets strength requirements but also shortens the manufacturing process and cycle, reduces costs, and improves efficiency. The reinforcement structure 7 strengthens the boom body 1 and also strengthens the connection points such as the first hydraulic cylinder mounting portion 2, the boom mounting portion 4, the bucket transmission mechanism mounting portion 5, and the bucket mounting portion 6.

[0046] The excavator boom can be applied to mini excavators. The boom body 1 plays the main role of bearing the load. The first hydraulic cylinder mounting part 2 is used to connect the hydraulic cylinder on the boom. The second hydraulic cylinder mounting part 3 is used to connect the hydraulic cylinder on the excavator boom. The boom mounting part 4 is used to be articulated with the boom. The bucket transmission mechanism mounting part 5 is used to connect the transmission mechanism of the bucket. The hydraulic cylinder on the boom is connected to the transmission mechanism of the bucket to control the rotation of the bucket. The hydraulic cylinder on the boom can drive the boom to rotate relative to the boom. The above is the conventional connection method of excavator parts and will not be repeated here.

[0047] It should be noted that the excavator boom in the above-mentioned embodiment is designed as a monolithic cast structure based on the installation dimensions of conventional welded booms. This structural design maintains the original installation dimensions. Reinforcing ribs are installed at key stress points, and local structural adjustments are made where reinforcement is not required. This arrangement allows the monolithic cast boom to replace the conventional welded boom in terms of installation dimensions, while also significantly reducing its overall weight, which in turn reduces raw material costs. Furthermore, a single mold can be used, resulting in hundreds or even more booms being cast per furnace. The larger the batch size, the lower the unit cost. This eliminates some of the traditional welding steps. The monolithic cast boom blank can be directly machined to the required dimensions on a lathe, making it highly practical. The excavator boom in the above-mentioned embodiment features a simple overall structure, making it easy to manufacture. Its production cost is approximately 40% lower than that of conventional welded booms for excavators of the same tonnage. This improves production efficiency and reduces the risk of component damage.

[0048] Reference Figure 3 The bucket arm in the prior art includes a box structure composed of a U-shaped plate and a bottom plate. One end of the box structure is provided with a shaft sleeve for connecting the bucket and the transmission mechanism, and the U-shaped plate and the bottom plate are connected by welding; the other end of the U-shaped plate is provided with two connecting plates for connecting the arm and the hydraulic cylinder, and the two connecting plates are connected by a reinforcing rod, and the connecting plate and the U-shaped plate are connected by welding. The bucket arm in the prior art is formed by welding multiple parts, and the manufacturing process and cycle are long, the cost is high and the efficiency is low. The excavator bucket arm in this embodiment is cast in one piece, which meets the strength requirements, shortens the manufacturing process and cycle, reduces costs and improves efficiency. The excavator bucket arm in this embodiment has the advantages of high structural strength, high precision, light weight and high reliability. It can improve the working efficiency, operating accuracy and reliability of the mini excavator, reduce maintenance costs and transportation costs, and is an important component of the mini excavator.

[0049] It should be noted that the design and manufacturing process of the excavator bucket arm in the above embodiment is as follows:

[0050] 1. Design and material selection

[0051] First, the bucket arm is designed based on the working needs and performance requirements of the mini excavator. The main dimensional parameters such as the length, width, and thickness of the bucket arm are determined to be consistent with those of the welded bucket arm.

[0052] When choosing materials, high-quality cast steel is recommended, considering the need for the boom to possess high strength, high wear resistance, and good casting properties. Cast steel offers high strength and hardness, capable of withstanding large digging and impact forces. It also offers excellent wear and corrosion resistance, making it suitable for use in harsh working environments.

[0053] 2. Casting process

[0054] Mold making: According to the design requirements, the casting mold of the bucket arm is made. The mold can be made by sand casting, metal casting or lost foam casting.

[0055] After the mold is made, it is inspected and debugged to ensure that the dimensional accuracy and surface quality of the mold meet the requirements.

[0056] Melting and pouring: The selected cast steel material is melted to reach the appropriate temperature and chemical composition. During the melting process, melting equipment such as electric furnaces and cupolas can be used. The appropriate melting process is selected based on the material characteristics and production requirements.

[0057] After smelting, the molten steel is poured into the mold. During the pouring process, it is important to control the pouring speed and temperature to ensure that the molten steel fills all parts of the mold and avoid defects such as pores and shrinkage holes.

[0058] Cooling and demoulding: After pouring, let the molten steel cool naturally in the mold. During the cooling process, pay attention to controlling the cooling speed to avoid defects such as cracks in the bucket arm caused by excessive cooling.

[0059] After cooling to a certain temperature, demoulding is carried out. When demoulding, be careful to avoid damaging the surface quality of the boom.

[0060] 3. Subsequent Processing

[0061] Cleaning and inspection: The boom needs to be cleaned after demoulding to remove impurities such as sand and oxide scale on the surface. Cleaning can be done by sand blasting, shot blasting and other processes to make the surface of the boom smoother and flatter.

[0062] After cleaning, the boom is inspected. Inspections include dimensional accuracy, surface quality, and internal defects. Measuring tools, flaw detectors, and other equipment can be used to ensure the boom meets quality requirements.

[0063] Machining and surface treatment: The boom is machined according to design requirements. Machining includes drilling, tapping, milling and other operations to create connection holes and mounting surfaces for the boom and other components.

[0064] After machining is completed, the boom is surface treated. Surface treatment can be done by spray painting, galvanizing, etc. to improve the corrosion resistance and aesthetics of the boom.

[0065] 4. Installation and debugging

[0066] Install the processed bucket arm with other parts of the mini excavator. During installation, pay attention to the tightness and sealing of the connection parts to ensure that the connection between the bucket arm and other parts is firm and reliable.

[0067] After installation, the mini excavator is debugged. The debugging content includes the flexibility of the bucket arm, digging force, working speed, etc. Through debugging, it is ensured that the performance indicators of the mini excavator meet the requirements.

[0068] In some embodiments, the boom body 1 is a roughly triangular structure with two sides sharing the same portion, and includes a vertical plate 11, a first top plate 12, a second top plate 13, a first bottom plate 14, and a second bottom plate 15. The first top plate 12, the second top plate 13, the first bottom plate 14, and the second bottom plate 15 are fixedly arranged in sequence along the outer contour of the vertical plate 11, and the plane where the vertical plate 11 is located intersects with the planes where the first top plate 12, the second top plate 13, the first bottom plate 14, and the second bottom plate 15 are located, respectively. The vertical plate 11 is located at the center of the first top plate 12, the second top plate 13, the first bottom plate 14, and the second bottom plate 15.

[0069] Among them, the first hydraulic cylinder mounting part 2 is arranged at the junction of the first top plate 12 and the second top plate 13; the second hydraulic cylinder mounting part 3 is arranged at the junction of the second top plate 13 and the first bottom plate 14; the boom mounting part 4 is arranged at the junction of the first bottom plate 14 and the second bottom plate 15; the bucket mounting part 6 is arranged at the junction of the second bottom plate 15 and the first top plate 12; the bucket transmission mechanism mounting part 5 is arranged between the second bottom plate 15 and the first top plate 12.

[0070] In the above embodiment, referring to Figure 1Taking the line connecting the first hydraulic cylinder mounting portion 2 and the boom mounting portion 4 as the dividing line, the left and right sides of the boom body 1 are respectively approximately triangular structures, which have a strong stability effect. The vertical plate 11 and the four side plates are the main force-bearing components, and the connection structure between the boom and other components is mostly arranged at the intersection of adjacent side plates, so that the connection structure has a strong load-bearing capacity. The vertical plate 11 is arranged in the center, which can reduce the setting of one vertical plate or side plate compared to the box-type structure in the prior art (with two side plates), and use several reinforcing structures for support, which can ensure sufficient support strength while reducing the material consumption. In addition, the stress concentration point of the top and bottom plates is in the middle position, and the vertical plate 11 is arranged in the middle to achieve the best support effect.

[0071] In some embodiments, the end of the first top plate 12 near the first hydraulic cylinder mounting portion 2 is an arc-shaped structure that bulges toward the side of the vertical plate 11. The middle portion of the first top plate 12 and the end near the bucket mounting portion 6 are straight structures. The width of the arc-shaped structure gradually decreases in the direction toward the first hydraulic cylinder mounting portion 2. The arc-shaped structure of the first top plate 12 can reduce the material used for the bucket arm and reduce stress concentration. The axial dimension of the first hydraulic cylinder mounting portion 2 is slightly smaller than the width of the first top plate 12. The arc-shaped structure gradually decreases in width in the direction toward the first hydraulic cylinder mounting portion 2, serving as a transitional connection.

[0072] In some embodiments, the second top plate 13 and the second bottom plate 15 are both flat structures.

[0073] In some embodiments, the first base plate 14 is an arc-shaped structure that protrudes toward the side of the vertical plate 11. The first base plate 14 is concave toward the side of the vertical plate 11, which can reduce the material used for the boom, especially increase the structural strength, and evenly disperse the pulling force applied to the boom by the first hydraulic cylinder; the axial dimension of the second hydraulic cylinder mounting part 3 is slightly smaller than the axial dimension of the boom mounting part 4, and the width of the first base plate 14 gradually decreases in the direction pointing to the second hydraulic cylinder mounting part 3, serving as a transition connection.

[0074] In some embodiments, the first hydraulic cylinder mounting portion 2, the second hydraulic cylinder mounting portion 3, the boom mounting portion 4, the bucket transmission mechanism mounting portion 5, and the bucket mounting portion 6 are all sleeve-type structures, with the axes of the sleeve-type structures arranged parallel to each other and intersecting the plane of the vertical plate 11. The apertures of the first hydraulic cylinder mounting portion 2 and the second hydraulic cylinder mounting portion 3 are smaller than the apertures of the boom mounting portion 4, the bucket transmission mechanism mounting portion 5, and the bucket mounting portion 6. The dipper arm is connected to the hydraulic cylinder and other components via an articulated shaft and a sleeve-type structure.

[0075] In some embodiments, the sleeve-shaped structure has a bearing mounting step for mounting bearings. For example, bearings are mounted at both ends of the sleeve-shaped structure, and the hinge shaft is mounted in the bearings, so that the hinge shaft and the sleeve-shaped structure rotate more smoothly, reducing friction, reducing noise, and increasing service life. Along the width direction of the second top plate 13, the first hydraulic cylinder mounting portion 2 and the second hydraulic cylinder mounting portion 3 extend from one side of the second top plate 13 to the other side. Figure 3 Compared to the double short shaft sleeve support method of the box support structure in the prior art, the integral long sleeve type structure (each mounting part) in the embodiment of the utility model can increase the force-bearing area. Such an arrangement can make the first hydraulic cylinder mounting part 2 and the second hydraulic cylinder mounting part 3 have a strong wrapping property on the articulated shaft, more evenly distribute the load received by the first hydraulic cylinder mounting part 2 and the second hydraulic cylinder mounting part 3, and improve the strength of the bucket arm. It should be noted that the boom mounting part 4, the bucket transmission mechanism mounting part 5 and the bucket mounting part 6 have a certain axial dimension, which is roughly the same as the width of the side plate, and can evenly bear the load transmitted by the articulated shaft, thereby improving the strength of the bucket arm.

[0076] In some embodiments, the reinforcement structure 7 includes a rib structure fixedly mounted on one or both sides of the vertical plate 11. A rib structure may be mounted on both sides. The rib structure includes a first rib 71 and a second rib 72. The first rib 71 and the second rib 72 are arranged parallel to each other. The two ends of the first rib 71 are respectively connected to a position of the first top plate 12 near the bucket transmission mechanism mounting portion 5 and a position of the second bottom plate 15 near the bucket transmission mechanism mounting portion 5. The two ends of the second rib 72 are respectively connected to a position of the first top plate 12 near the first hydraulic cylinder mounting portion 2 and the middle of the second bottom plate 15. The first rib 71 and the second rib 72 enhance the connection strength between the first top plate 12, the second bottom plate 15, and the vertical plate 11, thereby preventing deformation of weak portions of the boom.

[0077] In some embodiments, the rib structure further includes a third rib 73, a fourth rib 74, and a fifth rib 75. The ends of the third rib 73 are connected to the bucket transmission mechanism mounting portion 5 and the bucket mounting portion 6, respectively; the ends of the fourth rib 74 are connected to the bucket transmission mechanism mounting portion 5 and the first rib 71, respectively; and the ends of the fifth rib 75 are connected to the first hydraulic cylinder mounting portion 2 and the boom mounting portion 4, respectively.

[0078] In the above embodiment, the third rib 73 enhances the connection strength of the bucket transmission mechanism mounting part 5, the bucket mounting part 6 and the vertical plate 11, the fourth rib 74 enhances the connection strength of the bucket transmission mechanism mounting part 5, the first rib 71 and the vertical plate 11, and the fifth rib 75 enhances the connection strength of the first hydraulic cylinder mounting part 2, the boom mounting part 4 and the vertical plate 11.

[0079] In some embodiments, the joints between the boom body 1 , the sleeve-type structure, and the reinforcement structure 7 are all provided with rounded transition connection structures to reduce stress concentration.

[0080] The excavator bucket arm in the embodiment of the utility model has the following advantages and technical effects:

[0081] 1. The integral casting creates a more compact and robust arm structure. During excavation, it can withstand greater digging and impact forces, reducing the risk of deformation and damage caused by external forces. Whether digging through hard soil and rock or performing heavy loads, the integrally cast arm maintains stable performance, improving the efficiency and reliability of the mini excavator.

[0082] 2. Compared to welded or assembled booms, one-piece cast booms have no welded joints or weak points in the connection area. This makes the boom less likely to crack or break during long-term use, extending its service life and reducing maintenance costs.

[0083] 3. The casting process precisely controls the size and shape of the boom, ensuring that every part meets the design requirements. This allows the boom to fit more closely with other components, reducing play and looseness, and improving the mini excavator's operational precision and stability. For example, when performing fine excavation or pipe installation, the high-precision boom allows for better control of digging depth and position, enhancing work quality.

[0084] 4. The one-piece cast boom has a smoother surface, reducing the adhesion of dirt and debris. This not only helps keep the boom clean, but also reduces digging resistance and improves digging efficiency. Furthermore, the smooth surface reduces soil damage, which helps protect the environment.

[0085] 5. The integral cast boom can adopt optimized design and materials to reduce weight while ensuring strength. The lighter boom can reduce the overall weight of the mini excavator, improve maneuverability and flexibility, and make it easier to operate in narrow work sites or complex terrain.

[0086] 6. The integral cast bucket arm is lighter than the welded bucket arm, which can reduce the fuel consumption and transportation costs of the mini excavator. This is an important advantage for mini excavators that need to be moved frequently.

[0087] 7. The production process of integral cast bucket arms generally adopts advanced casting technology and quality control systems to ensure that each bucket arm has consistent high quality. This reduces the risk of failure due to manufacturing defects and improves the reliability and stability of the mini excavator.

[0088] 8. Casting materials generally have good wear resistance and corrosion resistance, and can adapt to various harsh working environments. This makes the integral casting bucket arm less susceptible to wear and corrosion during long-term use and maintains good performance.

[0089] It should be understood that the present invention is not limited to the specific configurations and processes described above and illustrated in the figures. For the sake of brevity, detailed descriptions of known methods are omitted. In the above embodiments, several specific steps are described and illustrated as examples. However, the method process of the present invention is not limited to the specific steps described and illustrated. Those skilled in the art may make various changes, modifications, and additions, or change the order of the steps after understanding the spirit of the present invention.

[0090] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with or replace features of other embodiments.

[0091] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An excavator bucket arm, characterized in that: include: A bucket arm body (1), a first hydraulic cylinder mounting portion (2), a second hydraulic cylinder mounting portion (3), a boom mounting portion (4), a bucket transmission mechanism mounting portion (5), a bucket mounting portion (6), and a reinforcement structure (7); The first hydraulic cylinder mounting portion (2), the second hydraulic cylinder mounting portion (3) and the boom mounting portion (4) are all arranged at one end of the boom body (1); the first hydraulic cylinder mounting portion (2), the second hydraulic cylinder mounting portion (3) and the boom mounting portion (4) are arranged in a triangular shape and are all located at the edge of the boom body (1); The bucket transmission mechanism mounting portion (5) and the bucket mounting portion (6) are both arranged at the other end of the boom body (1) and along the length direction of the boom body (1); The reinforcement structure (7) is arranged on the boom body (1), and at least a portion of the reinforcement structure (7) is connected to one or more of the first hydraulic cylinder mounting portion (2), the second hydraulic cylinder mounting portion (3), the boom mounting portion (4), the bucket transmission mechanism mounting portion (5), and the bucket mounting portion (6); The boom body (1), the first hydraulic cylinder mounting portion (2), the second hydraulic cylinder mounting portion (3), the boom mounting portion (4), the bucket transmission mechanism mounting portion (5), the bucket mounting portion (6) and the reinforcement structure (7) are integrally cast.

2. The excavator bucket arm according to claim 1, characterized in that: The boom body (1) is a nearly triangular structure with two sides sharing the same portion, and the boom body (1) comprises a vertical plate (11), a first top plate (12), a second top plate (13), a first bottom plate (14), and a second bottom plate (15); The first top plate (12), the second top plate (13), the first bottom plate (14) and the second bottom plate (15) are fixedly arranged in sequence along the outer contour of the vertical plate (11); the plane where the vertical plate (11) is located intersects with the planes where the first top plate (12), the second top plate (13), the first bottom plate (14) and the second bottom plate (15) are located; and the vertical plate (11) is located at a central position among the first top plate (12), the second top plate (13), the first bottom plate (14) and the second bottom plate (15); The first hydraulic cylinder mounting portion (2) is arranged at a junction of the first top plate (12) and the second top plate (13); The second hydraulic cylinder mounting portion (3) is arranged at a junction of the second top plate (13) and the first bottom plate (14); The upper arm mounting portion (4) is arranged at the junction of the first base plate (14) and the second base plate (15); The bucket mounting portion (6) is arranged at the junction of the second bottom plate (15) and the first top plate (12); The bucket transmission mechanism mounting portion (5) is arranged between the second bottom plate (15) and the first top plate (12).

3. The excavator bucket arm according to claim 2, characterized in that: The end of the first top plate (12) close to the first hydraulic cylinder mounting portion (2) is an arc-shaped structure that bulges toward one side of the vertical plate (11); the middle portion of the first top plate (12) and the end close to the bucket mounting portion (6) are straight structures; the width of the arc-shaped structure gradually decreases in the direction toward the first hydraulic cylinder mounting portion (2).

4. The excavator bucket arm according to claim 2, characterized in that: The second top plate (13) and the second bottom plate (15) are both flat structures.

5. The excavator bucket arm according to claim 2, characterized in that: The first bottom plate (14) is an arc-shaped structure convex toward one side of the vertical plate (11), and the width of the first bottom plate (14) gradually decreases along the direction pointing toward the second hydraulic cylinder mounting portion (3).

6. The excavator bucket arm according to claim 2, characterized in that: The first hydraulic cylinder mounting portion (2), the second hydraulic cylinder mounting portion (3), the boom mounting portion (4), the bucket transmission mechanism mounting portion (5) and the bucket mounting portion (6) are all sleeve-type structures, the axes of the sleeve-type structures being arranged parallel to each other, and the axes of the sleeve-type structures intersecting with the plane where the vertical plate (11) is located.

7. The excavator bucket arm according to claim 6, characterized in that: A bearing mounting step is provided in the sleeve-type structure; along the width direction of the second top plate (13), the first hydraulic cylinder mounting portion (2) and the second hydraulic cylinder mounting portion (3) extend from one side of the second top plate (13) to the other side.

8. The excavator bucket arm according to claim 2, characterized in that: The reinforcing structure (7) includes a rib structure fixedly arranged on one side or both sides of the vertical plate (11), and the rib structure includes a first rib (71) and a second rib (72), the first rib (71) and the second rib (72) are arranged parallel to each other, the two ends of the first rib (71) are respectively connected to the position of the first top plate (12) close to the bucket transmission mechanism mounting part (5) and the position of the second bottom plate (15) close to the bucket transmission mechanism mounting part (5), and the two ends of the second rib (72) are respectively connected to the position of the first top plate (12) close to the first hydraulic cylinder mounting part (2) and the middle of the second bottom plate (15).

9. The excavator bucket arm according to claim 8, characterized in that: The rib structure further includes a third rib (73), a fourth rib (74) and a fifth rib (75); The two ends of the third rib (73) are respectively connected to the bucket transmission mechanism mounting portion (5) and the bucket mounting portion (6); Both ends of the fourth rib (74) are respectively connected to the bucket transmission mechanism mounting portion (5) and the first rib (71); Both ends of the fifth rib (75) are respectively connected to the first hydraulic cylinder mounting portion (2) and the boom mounting portion (4).

10. The excavator bucket arm according to claim 6, characterized in that: The joints of the boom body (1), the sleeve-shaped structure and the reinforcement structure (7) are all provided with rounded transition connection structures.

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