A hydraulic excavator

Abstract

This utility model discloses a hydraulic excavator, including an excavator body, a robotic arm connected to the excavator body, a bucket rotatably mounted at the end of the robotic arm, and a hydraulic cylinder for driving the bucket. It also includes a first connecting rod and a second connecting rod. The two ends of the first connecting rod are rotatably connected to the bucket and the second connecting rod, respectively. The two ends of the second connecting rod are rotatably connected to the first connecting rod and the robotic arm, respectively. The cylinder body of the hydraulic cylinder is rotatably connected to the robotic arm, and the piston rod of the hydraulic cylinder is rotatably connected to the hinge joint of the first and second connecting rods. The second connecting rod is arc-shaped. The bucket has side walls, and wear-resistant strips are fixedly mounted at the ends of the side walls. A claw seat is fixedly mounted at the end of the bucket, and a claw is detachably and fixedly connected to the claw. This hydraulic excavator is reasonably designed, which can alleviate the stress on the robotic arm and hydraulic cylinder, improve the wear resistance of the bucket, and extend the service life of the bucket.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, and in particular to a hydraulic excavator. Background Technology

[0002] Excavators are widely used in various engineering projects due to their flexible and powerful digging capabilities. Large mining excavators are also widely used in coal mining and production. The power performance of existing excavators is already excellent. The main problem in their use is the wear and tear on the grab bucket. Since the objects excavated in mines are mainly ore, the wear and tear on the grab bucket is far greater than that of ordinary earthmoving work. The stress requirements on the grab bucket, boom, and hydraulic cylinders are greatly increased, which seriously affects the service life of the grab bucket. This not only affects the progress of the project, but also increases the user's operating costs.

[0003] Therefore, it is necessary to improve existing hydraulic excavators. Utility Model Content

[0004] The purpose of this invention is to overcome the defects in the existing technology and provide a hydraulic excavator that can relieve the stress on the mechanical arm and hydraulic cylinder, improve the wear resistance of the bucket, and extend the service life of the bucket.

[0005] To achieve the above technical effects, the technical solution of this utility model is as follows: a hydraulic excavator, including an excavator body, a mechanical arm connected to the excavator body, a bucket rotatably disposed at the end of the mechanical arm, and a hydraulic cylinder for driving the bucket; it also includes a first connecting rod and a second connecting rod, the two ends of the first connecting rod being rotatably connected to the bucket and the second connecting rod respectively, the two ends of the second connecting rod being rotatably connected to the first connecting rod and the mechanical arm respectively, the cylinder body of the hydraulic cylinder being rotatably connected to the mechanical arm, and the piston rod of the hydraulic cylinder being rotatably connected to the hinge of the first connecting rod and the second connecting rod; the second connecting rod is arc-shaped; the bucket is provided with a side wall, and a wear-resistant strip is fixedly disposed at the end of the side wall; a claw seat is fixedly disposed at the end of the bucket, and a claw is detachably and fixedly connected to the claw seat.

[0006] According to one embodiment of the present invention, the claw base and the digging claw are arranged in several groups at intervals along the width direction of the digging bucket.

[0007] According to one embodiment of the present invention, the digging claw is inserted into the claw seat, and the digging claw and the claw seat are coaxially provided with a through hole, and a bolt is inserted into the through hole and fixedly connected with a nut.

[0008] According to one embodiment of the present invention, the claw seat is provided with an insertion block, the insertion block including an arc-shaped transition section, a contraction section and an abutment section connected in sequence, the end face and outer wall of the abutment section being planar.

[0009] According to one embodiment of the present invention, the digging claw is provided with a slot that engages with the insert block.

[0010] According to one embodiment of the present invention, the outer wall of the claw seat is provided with a limiting groove, and the digging claw is provided with a protrusion that limits and cooperates with the limiting groove.

[0011] According to one embodiment of the present invention, the through hole is disposed on the inner wall of the protrusion and the limiting groove.

[0012] According to one embodiment of the present invention, the claw seat is fixedly provided with reinforcing ribs.

[0013] According to one embodiment of the present invention, the bucket includes an arc-shaped bottom plate fixedly connected to the side wall and an end wear-resistant plate fixedly disposed at the end of the arc-shaped bottom plate. The side wall is provided with an installation groove, and the end wear-resistant plate is welded to the installation groove.

[0014] According to one embodiment of the present invention, a pusher blade is movably provided at the bottom of the excavator body.

[0015] The advantages and beneficial effects of this utility model are as follows: The hydraulic excavator of this utility model is reasonably designed. By setting an arc-shaped second connecting rod, it is easy to release stress during bucket operation and reduce the force on components such as the mechanical arm and hydraulic cylinder. By setting wear-resistant strips on the side wall of the bucket, the service life of the bucket is improved. By setting the digging claws detachably, it is easy to quickly replace the digging claws after they wear out. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the hydraulic excavator of this utility model; Figure 2 This is a structural diagram of the excavator bucket. Figure 3 yes Figure 2 An explosion diagram; Figure 4 This is a schematic diagram of the claw-shaped base; Figure 5 This is a schematic diagram of the excavator's structure; In the diagram: 1. Excavator body; 2. Mechanical arm; 3. Bucket; 31. Side wall; 311. Mounting slot; 32. Wear-resistant strip; 33. Arc-shaped bottom plate; 34. End wear-resistant plate; 4. Hydraulic cylinder; 51. First connecting rod; 52. Second connecting rod; 6. Claw seat; 61. Insert block; 611. Arc-shaped transition section; 612. Retracting section; 613. Abutment section; 62. Limiting groove; 63. Reinforcing rib; 7. Claw; 71. Slot; 72. Protrusion; 8. Through hole; 9. Push blade. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0018] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "horizontal," "vertical," "top," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Example

[0019] like Figure 1-5 As shown, the hydraulic excavator of this embodiment includes an excavator body 1, a mechanical arm 2 connected to the excavator body 1, a bucket 3 rotatably mounted at the end of the mechanical arm 2, and a hydraulic cylinder 4 for driving the bucket 3. It also includes a first connecting rod 51 and a second connecting rod 52. The two ends of the first connecting rod 51 are rotatably connected to the bucket 3 and the second connecting rod 52, respectively. The two ends of the second connecting rod 52 are rotatably connected to the first connecting rod 51 and the mechanical arm 2, respectively. The cylinder body of the hydraulic cylinder 4 is rotatably connected to the mechanical arm 2, and the piston rod of the hydraulic cylinder 4 is rotatably connected to the hinge joint of the first connecting rod 51 and the second connecting rod 52. The second connecting rod 52 is arc-shaped. The bucket 3 has a side wall 31, and a wear-resistant strip 32 is fixedly mounted at the end of the side wall 31. A claw seat 6 is fixedly mounted at the end of the bucket 3, and a claw 7 is detachably and fixedly connected to the claw seat 6.

[0020] This design can alleviate the stress burden on the robotic arm and hydraulic cylinder: the arc design can more smoothly release the impact force and torque generated during the excavation process, avoid stress concentration on the robotic arm and hydraulic cylinder, reduce wear and tear on components caused by excessive force, and extend the service life of the robotic arm and hydraulic cylinder.

[0021] In mining applications, the end of the bucket sidewall is a critical part that directly rubs and collides with the ore. Wear-resistant strips can directly resist the wear of the ore on the sidewall, reduce the deformation or damage of the bucket caused by wear, extend the overall service life of the bucket, and solve the problem of excessive wear of buckets in existing mining excavators.

[0022] Reduce digging claw maintenance costs and ensure operational efficiency: The digging claw is the core component of the bucket that directly contacts the ore, and it wears out the fastest. The detachable design means that when the digging claw wears out, there is no need to replace the entire bucket or claw base; only the individual digging claw needs to be disassembled and replaced with a new one. This convenient operation reduces equipment downtime for maintenance, lowers maintenance costs, and ensures the progress of engineering operations.

[0023] According to one embodiment of the present invention, the claw base 6 and the digging claw 7 are arranged in several groups at intervals along the width direction of the digging bucket 3.

[0024] This design enhances excavation efficiency and gripping capability: in mining scenarios, ore deposits are large and hard, and multiple sets of spaced-out claws can simultaneously contact the excavation face, increasing the gripping area and force of the bucket on the ore. Compared to a single set or a small number of claws, the multi-set design can more efficiently embed, crush, or grip the ore, adapting to the high-intensity excavation needs of mines.

[0025] Distribute stress and reduce excessive local wear: During mining, the impact and friction forces of ore on the digging claws are concentrated at the contact point. Multiple sets of spaced settings can evenly distribute these forces to different digging claws, preventing individual digging claws from deforming and wearing out rapidly due to overload.

[0026] According to one embodiment of the present invention, the digging claw 7 is inserted into the claw seat 6, and the digging claw 7 and the claw seat 6 are coaxially provided with a through hole 8, and a bolt is inserted into the through hole 8 and fixedly connected with a nut.

[0027] This design, with its plug-in and coaxial through-hole configuration, enables rapid and precise positioning, avoiding assembly deviations.

[0028] Double fixing structure to enhance connection strength and resist high impact in mining: In mining scenarios, the excavator claw needs to frequently impact and grab high-hardness ore, and simple plug-in connection is prone to loosening due to impact force.

[0029] Detachable design reduces maintenance costs and downtime: The claw is the most easily worn part of the bucket. Traditional fixing methods (such as welding) require cutting and re-welding when replacing it, which is complicated and time-consuming.

[0030] According to one embodiment of the present invention, the claw seat 6 is provided with an insertion block 61, the insertion block 61 including an arc-shaped transition section 611, a contraction section 612 and an abutment section 613 connected in sequence, the end face and outer wall of the abutment section 613 being planar.

[0031] Through this design, the shrinking section adapts to the slot structure, assisting in precise positioning; the planar abutment section enhances connection stability and disperses excavation stress. The end face and outer wall of the abutment section are set in a planar manner, which is the core force-bearing contact part between the insert and the slot: the planar end face can fit tightly with the plane at the bottom of the slot, eliminating the insertion gap and preventing the digging claw from shaking due to the gap when digging ore, thus ensuring operational accuracy; the planar outer wall can increase the contact area with the inner wall of the slot, evenly distributing the impact force and friction force of the ore on the digging claw during digging to the insert and claw seat, avoiding deformation of the insert or wear of the slot caused by local stress concentration, extending the service life of the claw seat and the digging claw, and adapting to the high hardness and high stress working environment of mining.

[0032] According to one embodiment of the present invention, the digging claw 7 is provided with a slot 71 that is inserted and engaged with the insert block 61.

[0033] This design enables precise and rapid positioning and simplifies the excavator claw assembly process.

[0034] According to one embodiment of the present invention, the outer wall of the claw seat 6 is provided with a limiting groove 62, and the digging claw 7 is provided with a protrusion 72 that limits and cooperates with the limiting groove 62.

[0035] This design restricts relative movement and prevents loosening during operation: Frequent equipment vibrations during excavation can cause slight displacement between the claw and its base, even with tightened bolts. The engagement of the limiting groove and the protrusion creates a mechanical lock, strictly limiting the lateral movement and rotation of the claw on its base. This prevents the claw from loosening or shifting due to vibration, ensuring the stability of the excavation operation and reducing safety risks caused by claw loosening.

[0036] According to one embodiment of the present invention, the through hole 8 is disposed on the inner wall of the protrusion 72 and the limiting groove 62.

[0037] This design forces the assembly to align, avoiding installation deviations. The core function of the protrusion and the limiting groove is to achieve precise engagement and positioning of the claw and the claw base. The through holes are located on the inner walls of these two components, meaning that before the bolts are inserted, the protrusion must be fully embedded in the limiting groove so that the through holes can be coaxially aligned.

[0038] According to one embodiment of the present invention, the claw seat 6 is fixedly provided with a reinforcing rib 63.

[0039] This design enhances the load-bearing capacity of the claw mount, resists high-impact damage, and ensures long-term stable load bearing.

[0040] According to one embodiment of the present invention, the bucket 3 includes an arc-shaped bottom plate 33 fixedly connected to the side wall 31 and an end wear-resistant plate 34 fixedly disposed at the end of the arc-shaped bottom plate 33. The side wall 31 is provided with an installation groove 311, and the end wear-resistant plate 34 is welded to the installation groove 311.

[0041] This design allows the end wear plates to specifically resist high wear and extend the bucket's lifespan: the bucket end is the critical area that first comes into contact with the ore and experiences the strongest impact during digging operations, and it is also the part of the traditional bucket most prone to wear and tear. The separately designed end wear plates can directly withstand the impact and friction of the ore, preventing the bucket body from thinning and breaking due to excessive wear, significantly extending the overall service life of the bucket, and reducing downtime for maintenance due to damage to the bucket end.

[0042] According to one embodiment of the present invention, a pusher 9 is movably provided at the bottom of the excavator body 1.

[0043] This design expands the site preparation capabilities and reduces reliance on auxiliary equipment: mines or construction sites often require handling scattered ore and earth, or leveling work areas. Movable bulldozers can be used directly to level the ground and gather loose materials without the need for additional bulldozers or other auxiliary equipment, reducing equipment investment costs and minimizing scheduling time between different devices, thus improving overall operational efficiency.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A hydraulic excavator, characterized in that, The device includes an excavator body (1), a mechanical arm (2) connected to the excavator body (1), a bucket (3) rotatably mounted at the end of the mechanical arm (2), and a hydraulic cylinder (4) for driving the bucket (3). It also includes a first connecting rod (51) and a second connecting rod (52), the two ends of the first connecting rod (51) being rotatably connected to the bucket (3) and the second connecting rod (52), respectively, and the two ends of the second connecting rod (52) being rotatably connected to the first connecting rod (51) and the mechanical arm (2), respectively. Next, the cylinder body of the hydraulic cylinder (4) is rotatably connected to the robotic arm (2), and the piston rod of the hydraulic cylinder (4) is rotatably connected to the hinge of the first connecting rod (51) and the second connecting rod (52); the second connecting rod (52) is arc-shaped; the bucket (3) is provided with a side wall (31), and the end of the side wall (31) is fixedly provided with a wear-resistant strip (32); the end of the bucket (3) is fixedly provided with a claw seat (6), and the claw seat (6) is detachably and fixedly connected with a claw (7).

2. The hydraulic excavator according to claim 1, characterized in that, The claw base (6) and the digging claw (7) are arranged in several groups at intervals along the width direction of the digging bucket (3).

3. The hydraulic excavator according to claim 1, characterized in that, The digging claw (7) is connected to the claw seat (6) by insertion. The digging claw (7) and the claw seat (6) are coaxially provided with a through hole (8). The bolt is inserted in the through hole (8) and fixedly connected with the nut.

4. The hydraulic excavator according to claim 3, characterized in that, The claw seat (6) is provided with a plug (61), which includes an arc-shaped transition section (611), a contraction section (612) and an abutment section (613) connected in sequence. The end face and outer wall of the abutment section (613) are planar.

5. The hydraulic excavator according to claim 4, characterized in that, The digging claw (7) is provided with a slot (71) that is engaged with the insert block (61).

6. The hydraulic excavator according to claim 3, characterized in that, The outer wall of the claw base (6) is provided with a limiting groove (62), and the digging claw (7) is provided with a protrusion (72) that is limited and cooperates with the limiting groove (62).

7. The hydraulic excavator according to claim 6, characterized in that, The through hole (8) is provided on the inner wall of the protrusion (72) and the limiting groove (62).

8. The hydraulic excavator according to claim 1, characterized in that, The claw seat (6) is fixedly provided with reinforcing ribs (63).

9. The hydraulic excavator according to claim 1, characterized in that, The bucket (3) includes an arc-shaped bottom plate (33) fixedly connected to the side wall (31) and an end wear-resistant plate (34) fixedly disposed at the end of the arc-shaped bottom plate (33). The side wall (31) is provided with an installation groove (311), and the end wear-resistant plate (34) is welded to the installation groove (311).

10. The hydraulic excavator according to claim 1, characterized in that, The excavator body (1) is equipped with a pusher (9) at its bottom.

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