Novel pedal frame assembly of large mine hydraulic excavator and excavator

Abstract

The utility model discloses a novel pedal frame assembly of a large mine hydraulic excavator and the excavator. The novel pedal frame assembly comprises a lower-layer pedal and auxiliary assembly and an upper-layer pedal and auxiliary assembly. The lower-layer pedal and auxiliary assembly comprises a lower-layer pedal frame, a bottom-layer pedal and a second fixing seat; the second fixing seat is positioned above the bottom-layer pedal and is used for fixing the lower-layer pedal frame; the second fixing seat is provided with a protruding part, and the protruding part of the second fixing seat and the bottom-layer pedal play a role in protecting the lower-layer pedal frame; the upper-layer pedal and auxiliary assembly comprises an upper-layer pedal frame, a left armrest and a right armrest; the left armrest and the right armrest are located on the two sides of the upper-layer pedal frame. According to the utility model, the three parts from the ground to the bottom-layer pedal, from the bottom-layer pedal to the lower-layer pedal frame and from the lower-layer pedal frame to the upper-layer pedal frame are reasonably matched, so that the problem of large gap fall between the pedals is perfectly solved, the climbing is very convenient, and the protection to the lower-layer pedal frame is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to a new footrest assembly and an excavator for a large mining hydraulic excavator. Background Technique

[0002] There are many defects in the existing footrest assembly.

[0003] Such as Figure 1 、 Figure 2 As shown, the first footrest 2 is connected to the first fixed seat 4 on the traveling frame 3 and is fixedly connected by the first washer 5 and the first bolt 6. Personnel climb through the first footrest 2 and the first handrail 1. Due to the large spacing drop between the ground and the first footrest 2, and between the first footrest 2 and the handrail 1, it is not convenient to climb.

[0004] Such as Figure 3 As shown, the first fixed seat 4 only plays the role of connecting and fixing the footrest 2. When the excavator is walking under the working conditions of a mine, it cannot protect the first footrest 2, the first washer 5, and the first bolt 6. Especially when operating in a harsh environment, it will accelerate the wear and collision of the first footrest 2, the first washer 5, and the first bolt 6 with foreign objects such as hard stones, greatly reducing their own service life.

[0005] Such as Figure 4 As shown, when the first footrest 2 is manufactured and formed, affected by the two foot notches, it is easy to have defects such as flanging and cracking at the four places of the footrest B, C, D, and E. Content of the Utility Model

[0006] Aiming at the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide a new footrest assembly and an excavator for a large mining hydraulic excavator.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] On the one hand, the utility model provides a new footrest assembly for a large mining hydraulic excavator, including a lower footrest and auxiliary components, and an upper footrest and auxiliary components; the lower footrest and auxiliary components include a lower footrest frame, a bottom pedal, and a second fixed seat; the second fixed seat is located above the bottom pedal, and the second fixed seat is used to fix the lower footrest frame; the second fixed seat is provided with a protruding part, and the protruding part of the second fixed seat and the bottom pedal both play a role in protecting the lower footrest frame; the upper footrest and auxiliary components include an upper footrest frame, a left handrail, and a right handrail; the left handrail and the right handrail are located on both sides of the upper footrest frame.

[0009] Further, the lower footrest frame includes a left vertical plate, a right vertical plate, a lower handrail, and a lower pedal.

[0010] Specifically, at least two lower pedals are arranged between the left vertical plate and the right vertical plate;

[0011] Specifically, inner folding mounting plates are arranged on both the left vertical plate and the right vertical plate. Second connection holes are formed in the inner folding mounting plates, and the lower pedal frame is connected to the second fixing seat through the second connection holes;

[0012] Specifically, the lower handrail is fixedly arranged on the outer sides of the left vertical plate and the right vertical plate.

[0013] Further, the front end face of the second fixing seat is an installation surface, and second threaded holes are arranged on the installation surface, and the second threaded holes correspond to the second connection holes.

[0014] Further, the left handrail and the right handrail have the same three-section structure, which is divided into an upper inclined section, a middle straight section, and a lower bent section;

[0015] Specifically, the lower bent section is bent inward by using an L-shaped arc transition;

[0016] Specifically, the upper inclined section is inclined and bent inward by using a non-L-shaped arc transition;

[0017] Specifically, an installation pipe is arranged on the middle straight section, and a fixing plate is fixedly connected to the end of the installation pipe, and the fixing plate is used for fixing with an excavator.

[0018] Further, the lower pedal is composed of two anti-slip plates;

[0019] Specifically, the mounting plates of the left vertical plate and the right vertical plate adopt an inner-folded L-shaped structure;

[0020] Specifically, the non-mounting areas of the left vertical plate and the right vertical plate adopt a straight plate structure, and the stiffness of the non-mounting area is lower than that of the mounting plate;

[0021] Specifically, the lower handrail is a thin-walled steel pipe with a diameter of 38 mm.

[0022] Further, the bottom pedal is made of NM360 material;

[0023] Specifically, the bottom pedal is in the shape of an isosceles trapezoid, and a large arc transition is made at the pointed foot;

[0024] Specifically, four light holes are formed in the bottom pedal;

[0025] Specifically, the upper pedal frame includes an outer peripheral plate and two internal serrated rib plates.

[0026] Further, the second fixing seat is divided into a guard plate and a fixing seat plate. The protruding part is on the guard plate, and the installation surface is on the fixing seat plate. The guard plate and the fixing seat plate are separately manufactured and connected into one body by welding.

[0027] On the other hand, the present utility model provides a large-scale mining hydraulic excavator, including a traveling frame, a slewing platform, and a novel footrest assembly for a large-scale mining hydraulic excavator; a bottom pedal and a second fixing seat are connected to the outside of the traveling frame; the lower footrest is connected to the second fixing seat, and two second fixing seats are arranged oppositely, divided into a left second fixing seat and a right second fixing seat, and the lower footrest is located between the protruding parts of the left second fixing seat and the right second fixing seat; the bottom pedal is located below the second fixing seat; the upper end of the lower footrest does not contact the slewing platform, so that the upper end of the lower footrest and the slewing platform will not interfere and collide during slewing operation; the upper footrest is connected to the slewing platform, and the left armrest and the right armrest are connected to the slewing platform, and the left armrest and the right armrest are located on both sides of the upper footrest.

[0028] Further, the second connection hole of the lower footrest and the second threaded hole of the second fixing seat are fixed with a second bolt and a second washer;

[0029] Specifically, the upper footrest and the slewing platform are fixed with a third bolt and a third washer;

[0030] Specifically, the fixing plates of the left armrest and the right armrest and the slewing platform are fixed with a fourth bolt and a fourth washer.

[0031] Further, the bottom pedal and the second fixing seat are fixedly connected to the traveling frame by welding.

[0032] The present utility model has the following beneficial effects compared with the prior art:

[0033] 1. For the present utility model, from the ground to the bottom pedal, from the bottom pedal to the lower footrest, and from the lower footrest to the upper footrest, the reasonable matching of these three major parts perfectly solves the problem of large distance drop between the footrests, and is extremely convenient for climbing.

[0034] 2. The second fixing seat of the present utility model enhances the protection effect on the lower footrest compared with the first fixing seat; the lower footrest is superior to the first footrest before optimization in terms of structure, manufacturing, performance, comfort, etc.; the structure and layout of the left armrest and the right armrest are superior to the first armrest before upgrading.

[0035] 3. The optimized footrest assembly of the present utility model has an overall structure that is easy to climb, easy to manufacture, high in comfort, good in protection, and high in safety. It is a novel footrest structure assembly that is worthy of reference and promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic structural diagram of the existing footrest assembly;

[0037] Figure 2 is Figure 1Top view of point A on the existing footrest assembly

[0038] Figure 3 Schematic structural view of the fixed seat in the existing footrest assembly

[0039] Figure 4 Schematic structural view of the footrest in the existing footrest assembly

[0040] Figure 5 Schematic structural view of the new footrest assembly of a large mining hydraulic excavator of the present utility model

[0041] Figure 6 Schematic structural view of the bottom pedal in the present utility model

[0042] Figure 7 Welding diagram of the bottom pedal, the second fixed seat and the walking frame in the present utility model

[0043] Figure 8 Schematic structural view of the second fixed seat in the present utility model

[0044] Figure 9 Schematic diagram of cost reduction manufacturing of the second fixed seat in the present utility model

[0045] Figure 10 Schematic structural view of the lower footrest in the present utility model

[0046] Figure 11 Schematic structural view of the vertical plates on both sides of the lower footrest in the present utility model

[0047] Figure 12 Assembly diagram of the left armrest, the right armrest and the upper footrest in the present utility model

[0048] In the figure: 1. First armrest; 2. First footrest; 3. Walking frame; 4. First fixed seat; 5. First washer; 6. First bolt; 7. Slewing platform; 8. Lower footrest; 9. Bottom pedal; 10. Second bolt; 11. Second washer; 12. Second fixed seat; 13. Upper footrest; 14. Third bolt; 15. Third washer; 16. Left armrest; 17. Right armrest; 18. Fourth bolt; 19. Fourth washer; 20. Left vertical plate; 21. Lower armrest; 22. Right vertical plate; 23. Lower pedal Detailed implementation mode

[0049] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0050] The left footrest frame assembly and the right footrest frame assembly of a large mining hydraulic excavator are basically identical in structure and appearance. Only the right footrest frame assembly will be described in this patent, and the left footrest frame assembly will not be described repeatedly.

[0051] Please refer to Figure 5 , a large mining hydraulic excavator includes a traveling frame 3 and a slewing platform 7. Please refer to Figures 5 to 12 , a new footrest frame assembly of a large mining hydraulic excavator includes a lower footrest and auxiliary components, and an upper footrest and auxiliary components.

[0052] The lower footrest and auxiliary components include a lower footrest frame 8, a bottom pedal 9, and a second fixing seat 12. The bottom pedal 9 and the second fixing seat 12 are welded to the outside of the traveling frame 3. Two second fixing seats 12 are arranged oppositely, divided into a left second fixing seat and a right second fixing seat. The second fixing seat 12 is located above the bottom pedal 9 and is used to fix the lower footrest frame 8. The lower footrest frame 8 and the second fixing seat 12 are fixed with a second bolt 10 and a second washer 11.

[0053] The upper footrest and auxiliary components include an upper footrest frame 13, a left armrest 16, and a right armrest 17. The upper footrest frame 13 is connected to the slewing platform 7, and the upper footrest frame 13 and the slewing platform 7 are fixed with a third bolt 14 and a third washer 15; the left armrest 16 and the right armrest 17 are respectively connected to the slewing platform 7, and the left armrest 16, the right armrest 17 and the slewing platform 7 are fixed with a fourth bolt 18 and a fourth washer 19. The left armrest 16 and the right armrest 17 are located on both sides of the upper footrest frame 13.

[0054] Among them, the lower footrest frame 8 includes a left vertical plate 20, a right vertical plate 22, a lower armrest 21, and a lower pedal 23. Three lower pedals 23 are arranged between the left vertical plate 20 and the right vertical plate 22. Inner folding mounting plates are provided on both the left vertical plate 20 and the right vertical plate 22. Second connection holes are opened on the inner folding mounting plates. The lower footrest frame 8 is connected to the second fixing seat 12 through the second connection holes. The lower armrest 21 is fixedly arranged on the outside of the left vertical plate 20 and the right vertical plate 22; the upper end of the lower footrest frame 8 is kept at a certain distance from the lower part of the slewing platform 7 to ensure that the two will not interfere and collide during the slewing operation of the whole machine.

[0055] Furthermore, the lower footrest frame 8 is in a trapezoidal layout, such asFigure 10 As shown, the lower footrest 8 has a precisely calculated layout. Its upper part maintains a relative distance from the lower part of the slewing platform 7 to ensure that they do not interfere or collide during slewing operations. The lower footrest 8 is a three-layer pedal structure. The distance between each lower pedal 23 is rationally arranged in combination with the principles of human kinematics to facilitate easy climbing of the footrest. Considering the distance between each lower pedal 23, the positions of the lower handrails 21 on both sides of the lower footrest 8 are rationally arranged so that it is easy and labor-saving to step on the lower pedal 23 and hold the lower handrail 21. Each lower pedal 23 is composed of two non-slip plates, and the distance between the non-slip plates is rationally arranged according to the foot length. The lower pedal 23 is composed of two non-slip plates, which enhances the overall strength and stiffness of the lower footrest 8. In the lower footrest 8 assembly, the left vertical plate 20 and the right vertical plate 22 are the skeletons of the lower footrest 8. The installation and fixing part adopts an inward-folded L-shaped structure to enhance its strength and stiffness. The upper non-installation areas of the left vertical plate 20 and the right vertical plate 22 adopt a straight plate structure, and its stiffness is lower than that of the L-shaped structure of the lower installation and fixing part. In this way, when the operator climbs the lower footrest 8, it has corresponding buffering and elasticity, enhancing the comfort of climbing for the operator. The lower handrail 21, on the premise of meeting the application strength and stiffness, is adapted to a thin-walled steel pipe with a diameter to facilitate easy grasping with both hands and has corresponding elasticity and buffering, improving the climbing comfort.

[0056] Among them, the bottom pedal 9 is welded to the outside of the walking frame 3, as Figure 7 shown, below the second fixing seat 12. The structure of the bottom pedal 9 is as Figure 6 shown. It is used for foot climbing and also protects the outside of the walking frame 3 to prevent hard materials such as large stones from colliding with the walking frame 3, thus protecting the lower footrest 8. The bottom pedal 9 is made of NM360 material, which is wear-resistant and suitable for collisions. Its shape is an isosceles trapezoid with a large arc transition at the pointed end to facilitate the quick diversion and drifting of hard materials such as stones, that is, to prevent hard materials from staying under the lower footrest 8 for too long. The welding edge F of the bottom pedal 9 is chamfered around to facilitate the welding and fusion of the bottom pedal 9 with the walking frame 3, making it firm and reliable. Four light holes are opened on the bottom pedal 9 for de-mud and also play a role in anti-slip.

[0057] Among them, the second fixing seat 12 is welded to the outside of the walking frame 3, as Figure 7 shown. It is used to position and install the lower footrest 8. The lower footrest 8 and the second fixing seat 12 are fixed with the second bolt 10 and the second washer 11, as Figure 5 shown. The structure of the second fixing seat 12 is as Figure 8As shown, its overall structural strength and protection performance are far superior to the first fixed seat 4 before optimization; the second fixed seat 12 is directly cut from steel plates, and the bottom circumference is beveled to facilitate full welding and firm bonding when the fixed seat 12 is welded to the outside of the walking frame 3; a protrusion N is arranged on the outside to play a protective role, mainly used to protect the lower footrest 8, and the lower footrest 8 is located between the protrusion of the left second fixed seat and the protrusion of the right second fixed seat; the front end face of the second fixed seat 12 is a mounting surface M, which is provided with a second threaded hole, and the second threaded hole corresponds to the second connecting hole. The mounting surface M can be milled, but the milling allowance of the mounting surface M is large, and the labor cost and tool cost are relatively high, which invisibly increases the manufacturing cost; therefore, the structure of the second fixed seat 12 is adjusted, such as Figure 9 As shown, the protrusion N and the mounting surface M with a distance difference are divided into two parts, namely the guard plate and the fixed seat plate. They are cut separately according to their respective thicknesses, and then the joint between the fixed seat plate with the mounting surface M and the guard plate as the protrusion N is beveled, welded and formed, and finally beveled around the bottom. This not only reduces the cost of milling the mounting surface M, but also saves a certain amount of steel, while improving manufacturing efficiency, which interprets the essence of cost reduction and efficiency improvement.

[0058] Wherein, the upper pedal frame 13 structure is as follows Figure 12 As shown, the upper pedal frame 13 is made of steel plate blanking, forming, and welding. The combination of the outer plate and the two inner serrated ribs is both anti-slip and load-bearing, meeting the needs of single-foot stepping;

[0059] Among them, the left handrail 16 and the right handrail 17 are structured as follows: Figure 12 As shown, the left handrail 16 and the right handrail 17 are three-section type, namely, an upper inclined section, a middle straight section, and a lower bent section; the lower bent section is formed by bending inwardly with an L-shaped arc transition, which is very convenient for natural grasping with both hands and climbing with the pedals; if the lower steel pipes of the left handrail 16 and the right handrail 17 adopt a straight-through structure, it is easy to scratch the arms and clothes when the operators grasp the lower parts of the left handrail 16 and the right handrail 17; the upper inclined section is formed by bending inwardly with a non-L-shaped arc transition, which is very It is user-friendly and very convenient for naturally and continuously grasping with both hands and climbing with feet; a mounting tube is provided in the middle straight section, and a fixing plate is fixedly connected to the end of the mounting tube, and the fixing plate is fixed to the rotating platform 7 by a fourth bolt 18 and a fourth washer 19. Under the influence of the upper inclined section and the lower bent section, the middle straight sections of the left handrail 16 and the right handrail 17 protrude outward, which is not only convenient for naturally and continuously grasping the handrails and climbing with feet, but also plays a role of clamping the body, thereby meeting the safety of high-altitude climbing with feet.

[0060] In a new footrest assembly of a large mining hydraulic excavator, the structure and the layout of the distances in height and size between the ground, the bottom pedal 9, the three lower footrests 8, and the upper footrest 13 extremely meet the requirement of the human body's physical strength to lift the legs smoothly and climb easily; both of the two lower handrails 21, the left handrail 16, and the right handrail 17 meet the requirement that both hands can grip and exert force naturally, facilitating climbing by foot; the left handrail 16 and the right handrail 17 bulge outwards, further facilitating natural gripping and climbing by foot, and at the same time playing a role in clamping the body, meeting the safety requirement for climbing by foot at height.

[0061] When in use, the operator first holds the two lower handrails 21 on both sides with both hands, and then, following the trend, steps on the bottom pedal 9 with the feet, and quickly climbs the first lower pedal 23 and the second lower pedal 23 of the lower footrest 8. After climbing the second lower pedal 23 of the lower footrest 8, the operator then holds the left handrail 16 and the right handrail 17 following the trend, and quickly climbs the third lower pedal 23 of the lower footrest 8 and the upper footrest 13. The operator holds the left handrail 16 and the right handrail 17 with both hands, steps onto the upper part of the excavator, and performs relevant operations. The whole movement process is easy, coherent, smooth, safe, and fast.

[0062] The upgraded footrest assembly has a split layout structure, mainly divided into three major parts: from the ground to the bottom pedal 9, from the bottom pedal 9 to the lower footrest 8, and from the lower footrest 8 to the upper footrest 13. The reasonable combination of these three major parts perfectly solves the problem of large distance differences between the footrests, making it extremely convenient to climb; the second fixing seat 12 enhances the protective effect on the lower footrest 8 compared with the first fixing seat 4; the lower footrest 8 is superior to the first footrest 2 before optimization in terms of structure, manufacture, performance, comfort, etc.; the structures and layouts of the left handrail 16 and the right handrail 17 are superior to those of the first handrail 1 before upgrading; the optimized footrest assembly has an overall structure that is easy to climb, easy to manufacture, has high comfort, good protection, and high safety, and is a new type of footrest structure assembly that is very worthy of reference and promotion.

[0063] In this application, any component itself that is not elaborated and the connection methods of the various components in this application belong to the well-known technologies in this technical field and can be directly applied without further elaboration.

[0064] In the present utility model, the term "a plurality of" refers to two or more unless otherwise clearly defined; terms such as "installation", "connection", "attachment", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "attachment" can be a direct attachment or an indirect attachment through an intermediate medium; for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0065] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0066] In the description of this specification, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model; in this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example; moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0067] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications; any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A new type of footrest frame assembly for a large mining hydraulic excavator, comprising a lower footrest and auxiliary components, an upper footrest and auxiliary components, characterized in that: The lower pedal and auxiliary components include a lower pedal frame, a bottom pedal, and a second fixing seat; The second fixing seat is located above the bottom pedal, and the second fixing seat is used to fix the lower pedal frame; The second fixing seat is provided with a protrusion, and the protrusion of the second fixing seat and the bottom pedal both play a role in protecting the lower pedal frame; The upper footrest and auxiliary components include an upper footrest frame, a left handrail, and a right handrail; The left handrail and the right handrail are located at both sides of the upper footrest.

2. The novel footrest assembly of a large mining hydraulic excavator according to claim 1 is characterized in that: The lower footrest frame comprises a left upright board, a right upright board, a lower handrail and a lower pedal; At least two lower pedals are arranged between the left vertical board and the right vertical board; The left vertical plate and the right vertical plate are both provided with an inward folding mounting plate, the inward folding mounting plate is provided with a second connecting hole, and the lower footrest is connected to the second fixing seat through the second connecting hole; The lower handrail is fixedly arranged on the outer sides of the left vertical plate and the right vertical plate.

3. The novel footrest assembly of a large mining hydraulic excavator according to claim 2 is characterized in that: The front end surface of the second fixing seat is a mounting surface, and a second threaded hole is provided on the mounting surface. The second threaded hole corresponds to the second connecting hole.

4. The novel footrest assembly of a large mining hydraulic excavator according to claim 3 is characterized in that: The left and right handrails have the same three-section structure, which is divided into an upper inclined section, a middle straight section, and a lower bent section; The lower bending section is formed by bending inwardly by L-shaped arc transition; The upper inclined section is formed by bending and tilting inwards using a non-L-shaped arc transition; The middle straight section is provided with a mounting pipe, the end of the mounting pipe is fixedly connected with a fixing plate, and the fixing plate is used for fixing to the excavator.

5. The novel footrest assembly of a large mining hydraulic excavator according to claim 2 is characterized in that: The lower pedal is composed of two anti-skid plates; The mounting plates of the left and right vertical plates adopt an inwardly folded L-shaped structure; The non-installation areas of the left and right vertical plates adopt a straight plate structure, and the rigidity of the non-installation areas is lower than that of the installation plates; The lower handrail is a thin-walled steel pipe with a diameter of 38 mm.

6. The novel footrest assembly of a large mining hydraulic excavator according to claim 1 is characterized in that: The bottom pedal is made of NM360 material; The bottom pedal is in the shape of an isosceles trapezoid, with a large arc transition at the pointed foot; The bottom pedal is provided with four light holes; The upper pedal frame comprises an outer peripheral plate and two inner serrated rib plates.

7. The novel footrest assembly of a large mining hydraulic excavator according to claim 3 is characterized in that: The second fixing seat is divided into a guard plate and a fixing seat plate. The protrusion is on the guard plate, and the mounting surface is on the fixing seat plate. The guard plate and the fixing seat plate are manufactured separately and connected as a whole by welding.

8. A large-scale mining hydraulic excavator, comprising a traveling frame and a rotary platform, characterized in that: Also includes a novel footrest assembly for a large mining hydraulic excavator as described in claim 4; The outer side of the walking frame is connected to the bottom pedal and the second fixed seat; The lower pedal frame is connected to the second fixing seat, and two second fixing seats are arranged opposite to each other, namely a left second fixing seat and a right second fixing seat, and the lower pedal frame is located between the protrusion of the left second fixing seat and the protrusion of the right second fixing seat; The bottom pedal is located below the second fixing seat; The upper end of the lower pedal frame does not contact the rotating platform, so that the upper end of the lower pedal frame and the rotating platform will not interfere with or collide during the rotating operation; The upper pedal frame is connected to the rotating platform, the left handrail and the right handrail are connected to the rotating platform, and the left handrail and the right handrail are located at both sides of the upper pedal frame.

9. A large-scale mining hydraulic excavator according to claim 8, characterized in that: The second connecting hole of the lower pedal frame and the second threaded hole of the second fixing seat are fixed by a second bolt and a second washer; The upper pedal frame and the rotating platform are fixed with a third bolt and a third washer; The fixing plates of the left and right handrails and the rotating platform are fixed by a fourth bolt and a fourth washer.

10. A large-scale mining hydraulic excavator according to claim 8, characterized in that: The bottom pedal and the second fixing seat are fixedly connected to the walking frame by welding.

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