Pedal plate of lower frame of excavator

Abstract

The utility model belongs to the technical field of engineering machinery, and particularly discloses an excavator lower frame pedal which comprises a middle plate, and side plates are fixedly connected to the two horizontal sides of the middle plate. A receding hole for feet to tread is formed in the middle of the middle plate, the receding hole is formed in a front-back penetrating mode, and sawteeth are arranged on the lower side wall of the receding hole and the upper end of the middle plate. The inner sides of the two side plates are fixedly connected with a mounting plate used for being connected with a lower frame, and the mounting plate is perpendicular to the middle plate. A mounting base used for being connected with a mounting plate is fixedly connected to a frame, a mounting hole is formed in the mounting plate, a bolt is mounted on the inner sides of two side plates, the axis of the bolt is perpendicular to the side plates, during driving, main collision exists on the side plates, the mounting plate abuts against the mounting base after collision, the rigidity of the side plates can be improved, and the working pressure of the bolt is reduced; the vertical plates are further fixedly connected between the two side plates and arranged on the rear side of the middle plate at intervals, the rigidity strength of the position, prone to collision, of the pedal can be enhanced, the deformation resistance of the pedal is improved, and the service life of the pedal is effectively prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, in particular to a foot pedal under a frame of an excavator. Background Art

[0002] Crawler excavators are the most commonly used mechanical equipment in the field of engineering construction. In order to facilitate people to get on and off the vehicle, the excavator's lower frame is generally equipped with foot pedals. At present, the lower frame foot pedals of excavators mainly have two structures: welded foot pedals and assembled foot pedals. Since the chassis of small and medium-sized excavators are relatively low and the working conditions are mostly earthwork conditions, they generally use welded single-stage foot pedals with simple structures. Large excavators generally have higher chassis and are mostly used in relatively harsh working conditions such as ore crushing and mining. They generally use assembled two-stage foot pedal structures. With the help of this foot pedal and the handrail of the cab to achieve three-point support, the driver can easily achieve passage between the ground and the crawler platform.

[0003] The assembled footrest has the advantages of being easy to disassemble and replace, and not affecting transportation after disassembly. Therefore, this structure is often used in large mining excavators. In order to meet the standard requirements for the pedal, the lower frame footrest generally protrudes more from the lower frame after assembly, and often even exceeds the width of the crawler track. When the excavator is walking and operating in harsh working conditions such as mines, the footrest is easily bumped by surrounding obstacles such as ore, causing the footrest to deform and damage, affecting its appearance and use. During walking operations, under the impact of a large collision force, the bolts that fix the footrest often break. The broken bolt part is difficult to remove from the fixing seat of the lower frame, making it difficult to replace a new footrest and making it difficult for the driver to get on and off the vehicle. Utility Model Content

[0004] Aiming at the problems in the prior art that the excavator foot pedal is easily impacted, the bolts are easily broken, and the maintenance is difficult, a foot pedal for the lower frame of the excavator is proposed. The utility model provides the following technical solutions:

[0005] A foot pedal for an excavator underframe comprises a pedal body, the pedal body comprises a middle plate, and side plates are fixedly connected to the middle plate on both horizontal sides; a clearance hole for stepping on is arranged in the middle of the middle plate; the clearance hole is arranged through-through from front to back, and serrations for anti-slip are arranged on the lower side wall of the clearance hole and the upper end of the middle plate; mounting plates for connecting to the underframe are fixedly connected to the inner sides of the two side plates, and the mounting plates are arranged perpendicular to the middle plate; vertical plates are fixedly connected between the two side plates, and the vertical plates are arranged at intervals on the rear side of the middle plate; a mounting base for connecting to the mounting plate is fixedly connected to the frame, and mounting holes coaxially matched and connected by bolts are arranged on the mounting plate and the mounting base, and the number of mounting holes on a single mounting plate is arranged at 2-4.

[0006] Preferably, the middle plate and the side plates are integrally formed.

[0007] Preferably, a reinforcing plate is fixedly connected between the vertical plate and the middle plate.

[0008] Preferably, the side panels are fixed to the lower portion of the middle panel.

[0009] Preferably, the bottom surface of the side plate is flush with the bottom surface of the middle plate, and the upper end surface of the vertical plate is flush with the cross section of the lower side wall of the clearance hole.

[0010] Preferably, the vertical plate is provided with left-right symmetrical recesses, and the recesses are provided below the bolt heads.

[0011] Preferably, a positioning groove is provided at the lower portion of the mounting base, and the positioning groove is clamped on the vertical plate.

[0012] Preferably, the number of mounting holes of a single mounting plate is set to 3.

[0013] Specifically, the sawtooth opening is arranged upward.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. When driving, the main collision occurs on the side panel. After the collision, the mounting plate abuts against the mounting base, which can improve the rigidity of the side panel that is mainly hit and reduce the working pressure of the bolts;

[0016] 2. A vertical plate is fixedly connected between the two side plates. The vertical plates are arranged at intervals on the rear side of the middle plate to enhance the rigidity of the pedals at the positions where they are prone to collision, improve the pedals' ability to resist deformation, and effectively extend the service life of the pedals.

[0017] 3. The chassis of large excavators generally adopts an assembled lower frame. The footrest of the lower frame often exceeds the width of the outer side of the track. If the footrest bolts are assembled perpendicular to the front and rear directions of the frame, when the footrest is hit, the direction of the impact force is nearly perpendicular to the axial direction of the bolt, and the bolt will be subjected to a large shear force and easily break. The assembly direction of the bolt is parallel to the front and rear directions of the lower frame. When the whole machine is moving, the impact force of the obstacle is generally parallel to the axial direction of the bolt, and the shear force on the bolt is very small. Therefore, the fixing bolts of the footrest will not break easily, thereby effectively solving the problem of easy breakage of the footrest bolts of the frame under mining conditions reported by the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the middle plate and the side plate of the utility model;

[0020] Figure 3 It is a schematic diagram of the top view structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the use state of the utility model;

[0022] In the attached drawings, 1 is the pedal body; 11 is the middle plate; 111 is the upper serrations; 112 is the clearance hole; 113 is the lower serrations; 12 is the side plate; 2 is the vertical plate; 3 is the mounting plate; 4 is the reinforcing plate; 5 is the lower frame; 6 is the mounting base; 7 is the bolts. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. The directional words mentioned in the following embodiments, such as "up", "down", "left" and "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional words used are used to illustrate rather than limit the creation of the present invention.

[0024] like Figure 1-3 As shown, a foot pedal of a lower frame 5 of an excavator comprises a pedal body 1, wherein the pedal body 1 comprises a middle plate 11, and side plates 12 are fixedly connected to the middle plate 11 on both sides horizontally; a clearance hole 112 for foot stepping is arranged in the middle of the middle plate 11, and the clearance hole 112 is arranged through front and back, and saw teeth for anti-slip are arranged on the lower side wall of the clearance hole 112 and the upper end of the middle plate 11, specifically, the saw teeth on the upper end of the middle plate 11 are upper saw teeth 111, which can be used as the second-step stepping position, and the lower side wall of the clearance hole 112 is the lower saw teeth 113, which can be used as the first-step stepping position; the inner sides of the two side plates 12 are fixedly connected with mounting plates 3 for connecting with the lower frame 5, and the mounting plates 3 are arranged perpendicular to the middle plate 11; A mounting base 6 for connecting with the mounting plate 3 is fixedly connected to the frame. The mounting plate 3 and the mounting base 6 are provided with mounting holes that are coaxially matched and connected by bolts 7. The bolts 7 are installed on the inner sides of the two side plates 12 and the inner sides of the mounting base 6. The axis of the bolt 7 is perpendicular to the side plate 12. When driving, the main collision occurs on the side plate 12. After the collision, the mounting plate 3 abuts against the mounting base 6, which can improve the rigidity of the side plate 12 that is mainly hit by the collision and reduce the working pressure of the bolt 7; the vertical plate 2 is also fixedly connected between the two side plates 12. The vertical plate 2 is arranged at intervals on the rear side of the middle plate 11, which can enhance the rigidity of the position where the pedal is easily bumped, improve the ability of the pedal to resist deformation, and effectively extend the service life of the pedal.

[0025] Specifically, the middle plate 11 is arranged vertically, the side plate 12 is fixed at the lower part of the middle plate 11, the bottom surface of the side plate 12 is arranged flush with the bottom surface of the middle plate 11, the upper end surface of the vertical plate 2 is arranged flush with the lower side wall section of the clearance hole 112, and the middle plate 11 and the side plate 12 are bent and formed as a pedal body 1, which can reduce the processing difficulty, improve the processing efficiency, and reduce the cost; a reinforcing plate 4 is fixedly connected between the vertical plate 2 and the middle plate 11, and the reinforcing plate 4 is arranged horizontally. The end of the reinforcing plate 4 is also fixedly connected to the mounting plate 3, so that the overall structure is more tight and the rigidity is improved.

[0026] The lower part of the pedal body 1, the vertical plate 2, the reinforcing plate 4 and the mounting plates 3 on both sides form a box reinforcement structure, which effectively improves the rigidity of the easily bumped position of the lower part of the pedal assembly, can effectively resist positive and lateral collisions, improve the anti-deformation ability of the pedal, and effectively extend the service life of the pedal. At the same time, the middle upper part of the vertical plate 2 is flush with the first-level pedal position, that is, the height of the lower layer of saw teeth 113. When stepping on, the front and rear parts of the foot can step on the vertical plate 2 and the lower layer of saw teeth 113 at the same time, which increases the contact area of ​​the foot, making it more comfortable and stable.

[0027] Specifically, the vertical plate 2 is symmetrically provided with recesses for making way, and the recesses for making way are provided below the head of the bolt 7 to provide operating space for the wrench.

[0028] Specifically, a positioning groove is provided at the lower part of the mounting base 6, and the positioning groove is clamped on the vertical plate 2, so that the mounting hole can be quickly positioned, which is convenient for installation and positioning.

[0029] Specifically, the serrated opening is arranged upward to facilitate contact with the sole and increase the friction of the sole; the number of mounting holes on a single mounting plate 3 is vertically and evenly spaced to be 3, which further improves the rigidity and shear resistance compared to 2.

[0030] The chassis of large excavators generally adopts an assembled lower frame 5. The foot pedal of the lower frame 5 often exceeds the width of the outer side of the track. If the foot pedal bolt 7 is assembled perpendicular to the front-to-back direction of the frame, when the foot pedal is hit, the direction of the impact force is nearly perpendicular to the axial direction of the bolt 7, and the bolt 7 will be subjected to a large shear force and easily break. The assembly direction of the bolt 7 is parallel to the front-to-back direction of the lower frame 5. When the whole machine is moving, the impact force of the obstacle is generally parallel to the axial direction of the bolt 7, and the shear force on the bolt 7 is very small. Therefore, the foot pedal bolt 7 will not break easily, thereby effectively solving the problem of easy breakage of the foot pedal bolt of the frame 5 under mining conditions reported by the market.

Claims

1. A foot pedal for an excavator lower frame, characterized in that: The pedal body (1) comprises a middle plate (11), and the middle plate (11) is fixedly connected to side plates (12) on both horizontal sides; a clearance hole (112) for stepping on is arranged in the middle of the middle plate (11), and the clearance hole (112) is arranged to be through-through from front to back; saw teeth for anti-slip are arranged on the lower side wall of the clearance hole (112) and on the upper end of the middle plate (11); the inner sides of the two side plates (12) are fixedly connected to the lower frame (5) A mounting plate (3) is connected, the mounting plate (3) is arranged perpendicular to the middle plate (11); a vertical plate (2) is fixedly connected between the two side plates (12), and the vertical plate (2) is arranged at intervals on the rear side of the middle plate (11); a mounting base (6) for connecting with the mounting plate (3) is fixedly connected to the frame, and mounting holes are arranged on the mounting plate (3) and the mounting base (6) that are coaxially matched and connected by bolts (7), and the number of mounting holes on a single mounting plate (3) is 2-4.

2. The excavator lower frame foot pedal according to claim 1, characterized in that: The middle plate (11) and the side plates (12) are integrally formed.

3. The excavator lower frame foot pedal according to claim 1 or 2, characterized in that: A reinforcing plate (4) is fixedly connected between the vertical plate (2) and the middle plate (11).

4. The excavator lower frame foot pedal according to claim 3, characterized in that: The side plate (12) is fixed to the lower part of the middle plate (11).

5. The excavator lower frame foot pedal according to claim 4, characterized in that: The bottom surface of the side plate (12) is flush with the bottom surface of the middle plate (11), and the upper end surface of the vertical plate (2) is flush with the lower side wall section of the clearance hole (112).

6. The excavator lower frame foot pedal according to claim 1, characterized in that: The vertical plate (2) is provided with left-right symmetrical recesses, and the recesses are provided below the heads of the bolts (7).

7. The excavator lower frame foot pedal according to claim 1 or 6, characterized in that: A positioning groove is provided at the lower part of the installation base (6), and the positioning groove is clamped on the vertical plate (2).

8. The excavator lower frame foot pedal according to claim 1, characterized in that: The number of mounting holes of a single mounting plate (3) is set to 3.

9. The excavator lower frame foot pedal according to claim 1, characterized in that: The sawtooth opening is arranged upward.

Images