A rail-road dual-purpose walking excavator for rail grinding operation

Abstract

The utility model provides a kind of for rail grinding operation's highway-railway dual-purpose walking excavator, comprising: walking excavator, two rail running devices, rail polishing device and two rails;The walking excavator includes four walking wheels, operation arm, main machine platform;Four The walking wheel is connected with the main machine platform by support leg, and the operation arm is connected with the main machine platform by pin shaft;Two The rail running device is respectively installed in the front and rear positions of the walking excavator and is connected with the walking excavator by pin shaft;The rail polishing device is installed in the front end of the rail running device and is connected with the rail running device by pin shaft.The utility model provides a kind of for rail grinding operation's highway-railway dual-purpose walking excavator, and two rail running devices are arranged on walking excavator to ensure that walking excavator is stably walked on rail, and highway-railway dual-purpose of walking excavator is realized.

Description

Technical Field

[0001] This utility model relates to the field of rail engineering machinery, and in particular to a road-rail dual-purpose walking excavator for rail grinding operations. Background Technology

[0002] With its four-legged walking mechanism, the walking excavator has all-terrain working capability, and can autonomously cross terrain such as tracks, steps, and ditches. It can adapt to environments where traditional tracked equipment is difficult to operate in, such as gravel, mud, and steep slopes. It performs outstandingly in mountainous, riverine, disaster relief, and rescue scenarios. Moreover, it is compact in size and its outriggers can be flexibly extended and retracted, making it suitable for working in narrow spaces. It can also be equipped with a variety of attachments to complete complex tasks, becoming an important supplement to the field of rail engineering.

[0003] However, the existing quadruped walking excavators in China have many limitations: they cannot walk smoothly on rails, making it difficult to ensure good continuous operation stability when performing track operations such as replacing sleepers and ballast shaping; they are difficult to move smoothly over long distances when working on the line, requiring the assistance of transport flatbed trucks, which increases transportation costs and reduces work efficiency; at the same time, they lack the function of continuous grinding operations for rail grinding devices, making it difficult to meet the maintenance requirements of existing railways.

[0004] Therefore, it is necessary to provide a dual-purpose (road and rail) walking excavator for rail grinding operations to solve the above-mentioned technical problems. Utility Model Content

[0005] This utility model provides a dual-purpose (road and rail) walking excavator for rail grinding operations, which solves the problems of existing four-legged walking excavators being unable to walk smoothly on rails, having poor stability during continuous operation, requiring transport flatbed trucks for long-distance transfers, and lacking rail grinding operation functions, making it difficult to meet the needs of railway maintenance.

[0006] To solve the above-mentioned technical problems, this utility model provides a dual-purpose (road and rail) walking excavator for rail grinding operations, comprising:

[0007] Walking excavator, two rail traveling devices, rail grinding device and two rails;

[0008] The walking excavator includes four walking wheels, a working arm, and a main platform; the four walking wheels are connected to the main platform via outriggers, and the working arm is connected to the main platform via pins.

[0009] Two rail traveling devices are respectively installed at the front and rear positions of the walking excavator and connected to the walking excavator via pins. Each rail traveling device includes a rail traveling wheel pair, two friction drive steel cylinders, bolts, a ballast plate, a connecting plate, a hydraulic cylinder, and a traveling device main frame. The rail traveling wheel pair and the connecting plate are clamped together by bolts. The two friction drive steel cylinders are respectively connected to both sides of the rail traveling wheel pair by bolts. The ballast plate is connected to the front end of the rail traveling wheel pair by bolts. The connecting plate is welded to the front end of the traveling device main frame. The piston rod end of the hydraulic cylinder is connected to the top of the traveling device main frame via a pin.

[0010] The rail grinding device is installed at the front end of the rail traveling device and is connected to the rail traveling device via a pin.

[0011] Preferably, the cylinder end of the hydraulic cylinder can be quickly detached and connected to the front and rear ends of the host platform via a pin, the end of the main frame of the traveling device can be quickly detached and connected to the front and rear ends of the host platform via a pin, and the hydraulic plug of the hydraulic cylinder and the host platform can be quickly connected.

[0012] Preferably, the rail grinding device includes a grinding device hydraulic system, a grinding unit assembly, a traction rod, a grinding trolley frame assembly, a running wheel assembly, and a lifting interface. The grinding device hydraulic system is connected to the grinding unit assembly via hydraulic pipelines. One end of the traction rod is connected to the front end of the grinding trolley frame assembly via a pin. The running wheel assembly is installed below the grinding trolley frame assembly. The lifting interface is welded to the top of the grinding trolley frame assembly.

[0013] Preferably, the hoisting interface is quickly connected to the working arm, the other end of the traction rod can be quickly detached and connected to the connecting plate via a pin, and the hydraulic system can be quickly connected to the hydraulic plug of the working arm.

[0014] Preferably, an adjustment assembly is provided on one side of the connecting plate. The adjustment assembly includes a base, a fixed rod, a movable sleeve, a connecting bracket, an adjustment cover, a rotating rod, two limiting sleeves, and a fixing bolt. The base is connected to one side of the connecting plate, the fixed rod is connected to the surface of the base, the movable sleeve is fitted onto the surface of the fixed rod, the connecting bracket is connected to one side of the movable sleeve, and the adjustment sleeve is disposed inside the connecting bracket.

[0015] Preferably, the rotating rod is disposed between the connecting bracket and the adjusting cover, and the two limiting sleeves are respectively fitted on both sides of the surface of the rotating rod.

[0016] Preferably, the fixing bolt is disposed between the movable sleeve and the fixing rod.

[0017] Preferably, a filling device is provided on one side of the ballast plate. The filling device includes a base, a housing, a pump body, two delivery pipes, a filling head, and a filling pipe. The base is connected to one side of the ballast plate, the housing is installed on the surface of the base, and the pump body is installed on the top of the housing.

[0018] Preferably, the two delivery pipes are respectively connected to the input end and the output end of the pump body, and the filling head is connected to one end of one of the delivery pipes.

[0019] Preferably, the filling pipe is installed on one side of the top of the housing.

[0020] Compared with related technologies, the dual-purpose (road and rail) walking excavator for rail grinding provided by this utility model has the following advantages:

[0021] This utility model provides a road-rail dual-purpose walking excavator for rail grinding operations. Two rail traveling devices are set on the walking excavator to ensure the smooth movement of the walking excavator on the rails, thus realizing the dual-purpose use of the walking excavator for road and rail.

[0022] By using a valve-controlled hydraulic cylinder to drive the rail traveling device to rise and fall, the walking excavator can quickly switch between multiple traveling modes during line operations, which improves the level of automation and increases work efficiency.

[0023] The rail traveling device achieves rail movement through friction transmission of walking wheels, reducing the need for an additional power source;

[0024] The walking excavator's traction operation of the rail grinding device is simple, low-cost, and time-saving, reducing the skill requirements for operators and further expanding the operational functions of the dual-purpose road and rail walking excavator on railway lines. Attached Figure Description

[0025] Figure 1 A schematic diagram of the structure of a first embodiment of a dual-purpose (road and rail) walking excavator for rail grinding operations provided by this utility model;

[0026] Figure 2 for Figure 1 The diagram shows the structure of a walking excavator operation.

[0027] Figure 3 for Figure 1 The diagram shows the structure of the rail traveling device.

[0028] Figure 4 for Figure 1The side view of the rail traveling device shown;

[0029] Figure 5 for Figure 1 The diagram shows the structure of the rail grinding device.

[0030] Figure 6 for Figure 1 Right view of the rail grinding device shown;

[0031] Figure 7 A schematic diagram of the structure of a second embodiment of a dual-purpose (road and rail) walking excavator for rail grinding operations provided by this utility model;

[0032] Figure 8 for Figure 7 The enlarged schematic diagram of part A shown below;

[0033] Figure 9 This is a structural schematic diagram of the third embodiment of a road-rail dual-purpose walking excavator for rail grinding operations provided by this utility model.

[0034] The diagram is labeled as follows: 1. Walking excavator, 11. Walking wheel, 12. Working arm, 13. Main platform;

[0035] 2. Rail traveling device; 21. Rail traveling wheelset; 22. Friction transmission steel cylinder; 23. Bolt; 24. Ballast plate; 25. Connecting plate; 26. Hydraulic cylinder; 27. Main frame of traveling device.

[0036] 3. Rail grinding trolley; 31. Grinding device hydraulic system; 32. Grinding unit assembly; 33. Traction rod; 34. Grinding trolley frame assembly; 35. Running wheel assembly; 36. Lifting interface.

[0037] 4. Steel rails;

[0038] 5. Adjustment assembly; 51. Base; 52. Fixing rod; 53. Movable sleeve; 54. Connecting bracket; 55. Adjustment cover; 56. Rotating rod; 57. Limiting sleeve; 58. Fixing bolt;

[0039] 6. Filling device; 61. Base; 62. Housing; 63. Pump body; 64. Delivery pipe; 65. Filling head; 66. Filling pipe. Detailed Implementation

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0041] First Embodiment

[0042] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 ,in, Figure 1 A schematic diagram of the structure of a first embodiment of a dual-purpose (road and rail) walking excavator for rail grinding operations provided by this utility model; Figure 2 for Figure 1 The diagram shows the structure of a walking excavator operation. Figure 3 for Figure 1 The diagram shows the structure of the rail traveling device. Figure 4 for Figure 1 The side view of the rail traveling device shown;

[0043] Figure 5 for Figure 1 The diagram shows the structure of the rail grinding device. Figure 6 for Figure 1 The image shows a right view of a rail grinding device. A dual-purpose (road and rail) walking excavator for rail grinding operations includes:

[0044] Walking excavator 1, two rail traveling devices 2, rail grinding device 3 and two rails 4;

[0045] The walking excavator 1 includes four walking wheels 11, a working arm 12, and a main platform 13; the four walking wheels 11 are connected to the main platform 13 via outriggers, and the working arm 12 is connected to the main platform 13 via pins.

[0046] Two rail traveling devices 2 are respectively installed at the front and rear positions of the walking excavator 1 and connected to the walking excavator 1 via pins. Each rail traveling device 2 includes a rail traveling wheel pair 21, two friction drive steel cylinders 22, bolts 23, a ballast plate 24, a connecting plate 25, a hydraulic cylinder 26, and a traveling device main frame 27. The rail traveling wheel pair 21 and the connecting plate 25 are clamped together by bolts. The two friction drive steel cylinders 22 are respectively connected to both sides of the rail traveling wheel pair 21 by bolts 23. The ballast plate 24 is connected to the front end of the rail traveling wheel pair 21 by bolts. The connecting plate 25 is welded to the front end of the traveling device main frame 27. The piston rod end of the hydraulic cylinder 26 is connected to the top of the traveling device main frame 27 via a pin.

[0047] The rail grinding device 3 is installed at the front end of the rail traveling device 2 and is connected to the rail traveling device 2 via a pin.

[0048] The cylinder end of the hydraulic cylinder 26 can be quickly detached and connected to the front and rear ends of the host platform 13 via a pin. The end of the traveling device main frame 27 can be quickly detached and connected to the front and rear ends of the host platform 13 via a pin. The hydraulic plug of the hydraulic cylinder 26 and the host platform 13 can be quickly connected.

[0049] The outer surface of the friction drive steel cylinder 22 is machined with equidistant uneven grooves. The connecting plate 25 is provided with a connection interface for the rail grinding device 3. The main platform 13 is used to provide hydraulic power. During operation, it will quickly connect with the walking excavator 1. When it is required to travel on a standard gauge track, the main platform 13 controls the piston rod of the hydraulic cylinder 26 to extend. The piston rod pushes the main frame 27 of the traveling device to lower until the rail traveling wheelset 21 is fully pressed and placed on the rail 4. The main platform 13 controls the four walking wheels 11 to make contact with the four friction drive steel cylinders 22 respectively, completing the quick switch from walking mode to rail traveling mode. The main platform 13 drives the walking wheels 11 to rotate. The walking wheels 11 drive the friction drive steel cylinder 22 to rotate in the opposite direction through friction transmission. The friction drive steel cylinder 22 drives the rail traveling wheelset 21 to rotate, so that the whole machine can travel smoothly on the rail and achieve good operational stability.

[0050] The rail grinding device 3 includes a grinding device hydraulic system 31, a grinding unit assembly 32, a traction rod 33, a grinding trolley frame assembly 34, a running wheel assembly 35, and a hoisting interface 36. The grinding device hydraulic system 31 is connected to the grinding unit assembly 32 through hydraulic pipelines. One end of the traction rod 33 is connected to the front end of the grinding trolley frame assembly 34 through a pin. The running wheel assembly 35 is installed below the grinding trolley frame assembly 34. The hoisting interface 36 is welded to the top of the grinding trolley frame assembly 34.

[0051] The traveling wheel assembly 35 is installed below the grinding trolley frame assembly 34 to enable the device to move. The lifting interface 36 can be quickly connected to the working arm 12 to achieve lifting and transportation. The other end of the traction rod 33 can be quickly connected to the connecting plate 25 via a pin. After connection, it can run bidirectionally with the host machine. During operation, the walking excavator 1 quickly switches from walking mode to rail walking mode. The lifting interface 36 is quickly connected to the working arm 12. The host platform 13 controls the working arm 12 to lift and transport the rail grinding device 3 onto the rail 4. The traction rod 33 is quickly connected to the connecting plate 25. The hydraulic system 31 is quickly connected to the hydraulic plug of the working arm 12. The walking excavator 1 moves on the rail to achieve traction of the rail grinding device 3. This structure ensures the quality of the grinding operation.

[0052] The hoisting interface 36 can be quickly connected to the working arm 12, and the other end of the traction rod 33 can be quickly connected to the connecting plate 25 via a pin. The hydraulic system 31 can be quickly connected to the hydraulic plug of the working arm 12.

[0053] Compared with related technologies, the dual-purpose (road and rail) walking excavator for rail grinding provided by this utility model has the following advantages:

[0054] This utility model provides a road-rail dual-purpose walking excavator for rail grinding operations. Two rail traveling devices 2 are set on the walking excavator 1 to ensure the smooth travel of the walking excavator 1 on the rail 4, thus realizing the dual-purpose use of the walking excavator for road and rail.

[0055] By using a valve-controlled hydraulic cylinder to drive the rail traveling device 2 to rise and fall, the walking excavator 1 can quickly switch between multiple traveling modes during line operation, which improves the degree of automation and increases work efficiency.

[0056] The rail traveling device 2 achieves rail travel through friction transmission of the walking wheel 1, reducing the use of an additional power source;

[0057] The traction operation of the walking excavator 1 to the rail grinding device 3 is simple, low-cost, and time-saving, reducing the requirements for operator skills and further expanding the operational functions of the dual-purpose road and rail walking excavator on railway lines.

[0058] Second Embodiment

[0059] Please refer to the following: Figure 7 and Figure 8 Based on the first embodiment of this application, which provides a dual-purpose (road and rail) walking excavator for rail grinding operations, the second embodiment of this application proposes another dual-purpose (road and rail) walking excavator for rail grinding operations. The second embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the independent implementation of the first embodiment.

[0060] Specifically, the second embodiment of this application provides a road-rail dual-purpose walking excavator for rail grinding operations, which differs in that it also includes an adjustment component 5. The adjustment component 5 is disposed on one side of the connecting plate 25. The adjustment component 5 includes a base 51, a fixed rod 52, a movable sleeve 53, a connecting bracket 54, an adjustment cover 55, a rotating rod 56, two limiting sleeves 57, and a fixing bolt 58. The base 51 is connected to one side of the connecting plate 25, the fixed rod 52 is connected to the surface of the base 51, the movable sleeve 53 is sleeved on the surface of the fixed rod 52, the connecting bracket 54 is connected to one side of the movable sleeve 53, and the adjustment sleeve 55 is disposed inside the connecting bracket 54.

[0061] The rotating rod 56 is disposed between the connecting bracket 54 and the adjusting cover 55, and the two limiting sleeves 57 are respectively sleeved on both sides of the surface of the rotating rod 56.

[0062] The rotating rod 56 is made of high-strength alloy steel, and its two ends are connected to the connecting bracket 54 and the adjusting cover 55 respectively through bearings to ensure that the adjusting cover 55 can rotate flexibly. The limiting sleeve 57 is made of rubber and is tightly fitted on the surface of the rotating rod 56, close to the outer wall of the connecting bracket 54 and the adjusting cover 55 respectively. It can limit the rotation range of the adjusting cover 55 to prevent excessive rotation from damaging the components, and also provide a certain amount of damping after adjustment to keep the angle of the adjusting cover 55 stable.

[0063] The fixing bolt 58 is disposed between the movable sleeve 53 and the fixing rod 52.

[0064] The fixing bolt 58 is a knob-type bolt that penetrates the side wall of the movable sleeve 53 and is threadedly connected to the movable sleeve 53. Its end is in close contact with the surface of the fixing rod 52, and the movable sleeve 53 is fixed on the fixing rod 52 by friction. The surface of the fixing rod 52 can be set with scale lines to facilitate precise adjustment of the height of the movable sleeve 53 and meet the height requirements in different working scenarios.

[0065] The working principle of the dual-purpose (road and rail) walking excavator for rail grinding operations provided by this utility model is as follows:

[0066] When the height of the adjusting cover 55 needs to be adjusted, loosen the fixing bolt 58, slide the movable sleeve 53 up and down along the fixing rod 52, and drive the connecting bracket 54 and the adjusting cover 55 to move synchronously until the desired height is reached. Then tighten the fixing bolt 58 to fix the movable sleeve 53 to the fixing rod 52, thus completing the height adjustment. When the angle of the adjusting cover 55 needs to be adjusted, rotate the adjusting cover 55 around the rotating rod 56 as the axis. The limiting sleeve 57 will limit its rotation range to avoid over-adjustment. After adjusting to the appropriate angle, the damping effect of the limiting sleeve 57 keeps the adjusting cover 55 at the current angle, ensuring that it can accurately adapt to the traction angle of the rail grinding device 3 or the docking requirements of other working components.

[0067] Compared with related technologies, the dual-purpose (road and rail) walking excavator for rail grinding provided by this utility model has the following advantages:

[0068] This utility model provides a road-rail dual-purpose walking excavator for rail grinding operations. A base 51, a fixing rod 52, a movable sleeve 53, a connecting bracket 54, an adjusting cover 55, a rotating rod 56, two limit sleeves 57, and a fixing bolt 58 are provided on one side of the connecting plate 25 to cooperate with each other, so as to facilitate the adjustment of the height and angle of the adjusting cover 55 according to the usage.

[0069] Third Embodiment

[0070] Please refer to the following: Figure 9 Based on the first embodiment of this application, a dual-purpose (road and rail) walking excavator for rail grinding operations is provided. The third embodiment of this application proposes another dual-purpose (road and rail) walking excavator for rail grinding operations. The third embodiment is merely a preferred embodiment of the first embodiment, and its implementation will not affect the independent implementation of the first embodiment.

[0071] Specifically, the difference in the third embodiment of this application regarding a road-rail dual-purpose walking excavator for rail grinding operations is that it also includes a filling device 6. The filling device 6 is disposed on one side of the ballast plate 24. The filling device 6 includes a base 61, a housing 62, a pump body 63, two delivery pipes 64, a filling head 65, and a filling pipe 66. The base 61 is connected to one side of the ballast plate 24, the housing 62 is mounted on the surface of the base 61, and the pump body 63 is mounted on the top of the housing 62.

[0072] The two delivery pipes 64 are respectively connected to the input end and the output end of the pump body 63, and the filling head 65 is connected to one end of one of the delivery pipes 64.

[0073] The filling pipe 66 is installed on one side of the top of the housing 62.

[0074] The delivery pipe 64 is made of oil-resistant rubber tubing, which has good flexibility and corrosion resistance. The input end is connected to the inside of the housing 62, and the output end is connected to the filling head 65. The filling head 65 is made of metal and has a replaceable nozzle at the end, which can be adapted to lubrication points of different specifications. The nozzle is equipped with a valve to control the amount and speed of lubricating oil.

[0075] The working principle of the dual-purpose (road and rail) walking excavator for rail grinding operations provided by this utility model is as follows:

[0076] Before use, inject an appropriate amount of lubricating oil into the housing 62 through the filling pipe 66 and tighten the cap of the filling pipe 66. When it is necessary to lubricate the rail travel wheelset 21 and the friction drive steel cylinder 22, start the pump body 63. The pump body 63 draws lubricating oil from the housing 62 through the inlet delivery pipe 64 and delivers it to the filling head 65 through the outlet delivery pipe 64. Align the filling head 65 with the bearing of the rail travel wheelset 21 or the connection part of the friction drive steel cylinder 22, open the valve of the filling head 65, and the lubricating oil will be accurately added to the position that needs lubrication. After the filling is completed, close the valves of the pump body 63 and the filling head 65 to complete the lubrication operation.

[0077] Compared with related technologies, the dual-purpose (road and rail) walking excavator for rail grinding provided by this utility model has the following advantages:

[0078] This utility model provides a road-rail dual-purpose walking excavator for rail grinding operations. A base 61, a box 62, a pump body 63, two delivery pipes 64, a filling head 65, and a filling pipe 66 are set on the ballast plate 24 to facilitate the filling of lubricating oil into the rail running wheels 21 and the two friction transmission steel cylinders 22 that have been used for a long time.

[0079] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An amphibious walking excavator for rail grinding operations, characterized in that, include: Walking excavator, two rail traveling devices, rail grinding device and two rails; The walking excavator includes four walking wheels, a working arm, and a main platform; The four walking wheels are connected to the main platform via outriggers, and the working arm is connected to the main platform via a pin. Two rail traveling devices are respectively installed at the front and rear positions of the walking excavator and connected to the walking excavator via pins. Each rail traveling device includes a rail traveling wheel pair, two friction drive steel cylinders, bolts, a ballast plate, a connecting plate, a hydraulic cylinder, and a traveling device main frame. The rail traveling wheel pair and the connecting plate are clamped together by bolts. The two friction drive steel cylinders are respectively connected to both sides of the rail traveling wheel pair by bolts. The ballast plate is connected to the front end of the rail traveling wheel pair by bolts. The connecting plate is welded to the front end of the traveling device main frame. The piston rod end of the hydraulic cylinder is connected to the top of the traveling device main frame via a pin. The rail grinding device is installed at the front end of the rail traveling device and is connected to the rail traveling device via a pin.

2. The amphibious walking excavator for rail grinding operations according to claim 1, characterized in that, The cylinder end of the hydraulic cylinder can be quickly detached and connected to the front and rear ends of the host platform via a pin. The end of the main frame of the traveling device can be quickly detached and connected to the front and rear ends of the host platform via a pin. The hydraulic cylinder and the hydraulic plug of the host platform can be quickly connected.

3. The amphibious walking excavator for rail grinding operations according to claim 1, characterized in that, The rail grinding device includes a grinding device hydraulic system, a grinding unit assembly, a traction rod, a grinding trolley frame assembly, a running wheel assembly, and a lifting interface. The grinding device hydraulic system is connected to the grinding unit assembly via hydraulic pipelines. One end of the traction rod is connected to the front end of the grinding trolley frame assembly via a pin. The running wheel assembly is installed below the grinding trolley frame assembly. The lifting interface is welded to the top of the grinding trolley frame assembly.

4. The amphibious walking excavator for rail grinding operations according to claim 3, characterized in that, The hoisting interface can be quickly connected to the working arm, and the other end of the traction rod can be quickly detached and connected to the connecting plate via a pin. The hydraulic system can be quickly connected to the hydraulic plug of the working arm.

5. The amphibious walking excavator for rail grinding operations according to claim 1, characterized in that, An adjustment assembly is provided on one side of the connecting plate. The adjustment assembly includes a base, a fixed rod, a movable sleeve, a connecting bracket, an adjustment cover, a rotating rod, two limit sleeves, and a fixing bolt. The base is connected to one side of the connecting plate, the fixed rod is connected to the surface of the base, the movable sleeve is fitted onto the surface of the fixed rod, the connecting bracket is connected to one side of the movable sleeve, and the adjustment sleeve is disposed inside the connecting bracket.

6. The amphibious walking excavator for rail grinding operations according to claim 5, characterized in that, The rotating rod is disposed between the connecting bracket and the adjusting cover, and the two limiting sleeves are respectively fitted on both sides of the surface of the rotating rod.

7. The amphibious walking excavator for rail grinding operations according to claim 6, characterized in that, The fixing bolt is positioned between the movable sleeve and the fixing rod.

8. The dual-purpose (road and rail) walking excavator for rail grinding operations according to claim 1, characterized in that, A filling device is provided on one side of the ballast plate. The filling device includes a base, a housing, a pump body, two delivery pipes, a filling head, and a filling pipe. The base is connected to one side of the ballast plate, the housing is installed on the surface of the base, and the pump body is installed on the top of the housing.

9. The amphibious walking excavator for rail grinding operations according to claim 8, characterized in that, Two said delivery pipes are connected to the input end and the output end of the pump body respectively, and the filling head is connected to one end of one of the delivery pipes.

10. The amphibious walking excavator for rail grinding operations according to claim 8, characterized in that, The filling pipe is installed on one side of the top of the box.

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