Main track excavating device suitable for railway ballast sleeper bottom and excavating operation vehicle

Abstract

The embodiment of the invention provides a main track excavating device and an excavating operation vehicle suitable for railway ballast sleeper bottoms, the excavating device comprises a frame, a longitudinal moving device is slidably connected to the frame, a left-right transverse moving device capable of vertically sliding is mounted on the longitudinal moving device, and a main track excavating device is mounted on the left-right transverse moving device. The main line excavating device comprises a rotary sleeve device, a fixed hook device and an undercutting device, the output end of the rotary sleeve device is in transmission connection with one end of the undercutting device, the fixed hook device comprises a first lifting mechanism, and the output end of the first lifting mechanism is connected with the other end of the undercutting device. The fixing hook device and the bottom cutting device are connected in a matched mode to form an annular frame, and the excavation stability of the bottom cutting device is improved. The undercutting device can freely move in the frame through the longitudinal moving device and the left-right transverse moving device, and the undercutting device is suitable for excavation of various railway turnout areas and main track areas.

Description

Technical Field

[0001] The present application relates to the field of track maintenance equipment, and in particular to a mainline excavation device and an excavation vehicle suitable for the bottom of railway ballast sleepers. Background Art

[0002] The mainline excavation device is one of the core devices of large-scale road maintenance and screening machinery, which is related to the efficiency and quality of ballast cleaning. At present, the existing circulating chain excavation device is used for the bottom cleaning of domestic railway ballast, which requires manual adjustment of the length of the horizontal guide groove and change of the excavation width. In addition, a large number of manual labor is required to carry out the closing excavation and backfilling at the beginning and end of the operation. Human labor is required for excavation of the closing, and the bottom beam needs to be docked, installed, and dismantled before and after the excavation. This not only consumes a lot of physical strength of the workers but also increases the operation time of the entire section.

[0003] On the other hand, the current domestic railway ballast uses the existing circulating chain excavation device, and the other end of the undercutting device and the excavation chain mechanism of the undercutting device is in a cantilever state when working, which makes it difficult to ensure the working stability of the entire undercutting device. It will not only cause damage to the entire undercutting device during operation, but also affect the construction accuracy and work progress to a certain extent, and it is in urgent need of improvement. Summary of the invention

[0004] In order to solve one of the above-mentioned technical defects, a mainline excavation device suitable for the bottom of railway ballast sleepers is provided. Compared with the existing excavation device, the fixed hook device and the undercutting device are used in conjunction with each other, which can not only meet the excavation requirements of ballast, but also ensure the stability of the undercutting device.

[0005] A first aspect of the present application provides a mainline excavation device suitable for the bottom of a railway ballast sleeper, comprising a frame, a longitudinal moving device being slidably connected to the frame, a guide column frame being provided below the longitudinal moving device, a left and right lateral moving device being installed in the guide column frame and capable of vertically sliding along its guide column, a mainline excavation device being installed on both sides of the left and right lateral moving devices, respectively, the mainline excavation device comprising a rotating sleeve device and a fixed hook device respectively arranged at two ends of the same side of the left and right lateral moving devices, an undercutting device being provided between the rotating sleeve device and the fixed hook device, the output end of the rotating sleeve device being transmission-connected to the input end of one end of the undercutting device, and the other end of the undercutting device being connected to the fixed hook device.

[0006] Furthermore, the fixed hook device includes a first lifting mechanism, the base of the first lifting mechanism is arranged on the left and right transverse movement device, the output end of the first lifting mechanism is a hook shaft that can move vertically relative to the base, and the bottom of the hook shaft is connected to the other end of the bottom cutting device.

[0007] Furthermore, the bottom cutting device includes a support plate, both ends of which are rotatably connected to a driving sprocket and a driven sprocket, an excavating chain is wound around the outside of the support plate, the excavating chain is meshed with the driving sprocket and the driven sprocket, and the output end of the rotating sleeve device is transmission-connected to the driving sprocket.

[0008] Furthermore, a fixing seat is provided on one end of the support plate located at the driven sprocket, one end of the fixing seat is rotatably connected to the support plate, and the other end of the fixing seat is connected to the bottom of the hook shaft.

[0009] Furthermore, the rotary sleeve device comprises a mounting tube, the bottom of which is connected to the support plate, the upper part of which is provided with a rotary drive mechanism, and the output end of the rotary drive mechanism is transmission-connected to the side wall of the mounting tube.

[0010] Furthermore, a motor is provided on the top of the installation tube, the output end of the motor is connected to a transmission shaft, the transmission shaft is sleeved inside the installation tube, and the bottom of the transmission shaft is connected to a driving sprocket.

[0011] Furthermore, mobile boxes are installed on both sides of the left and right transverse moving devices, and main-line excavation devices are installed on the two mobile boxes. The mobile boxes on both sides of the left and right transverse moving devices are respectively provided with first driving mechanisms, and the first driving mechanisms are connected to the mobile boxes. The first driving mechanisms can drive the mobile boxes to make horizontal lateral movements relative to the two sides of the left and right transverse moving devices.

[0012] Furthermore, guide rails are horizontally installed on both sides of the frame, and a second driving mechanism is also installed on the frame. The second driving mechanism drives the longitudinal moving device to slide on the frame along the guide rails.

[0013] Furthermore, a second lifting mechanism is provided on the top of the longitudinal moving device, and the output end of the second lifting mechanism is connected to the top of the left and right transverse moving devices. A plurality of guide wheels are also installed on the left and right transverse moving devices, and the guide wheels are slidably connected to the guide columns on the guide column frame.

[0014] Furthermore, a side excavation device is installed on the frame at the other end relative to the mainline excavation device, and the side excavation device is connected to the frame through a cylinder.

[0015] The second aspect of the application provides an excavation vehicle, comprising the mainline excavation device as described above.

[0016] A mainline excavation device suitable for the bottom of railway ballast sleepers is used in the embodiment of the present application. When working, the hook shaft of the fixed hook device and the fixed seat of the bottom cutting device are matched and connected to form a circular frame, thereby avoiding the digging chain mechanism and the support plate from being in a cantilever state when working, and improving the excavation stability of the bottom cutting device; the present application utilizes a longitudinal moving device and a left and right lateral moving device, which can realize the bottom cutting device being able to rotate up and down, left and right, and in the vertical direction in the frame, and can adapt to the excavation of various railway turnout areas and mainline areas; the modular unit combination is adopted, which is convenient for disassembly, assembly and transportation, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 A schematic structural diagram of a mainline excavation device applicable to the bottom of a railway ballast pillow provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the assembly structure of the mainline excavation device provided in an embodiment of the present application;

[0020] Figure 3 A schematic diagram of the assembly structure of a rotary sleeve device provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the assembly structure of the longitudinal moving device provided in an embodiment of the present application;

[0022] Figure 5 Schematic diagram of the left and right lateral shifting device assembly structure provided in an embodiment of the present application.

[0023] Among them, 1 is a bottom cutting device, 11 is an excavating chain, 12 is a support plate, 13 is a fixed seat, 2 is a rotary sleeve device, 21 is a rotary drive mechanism, 22 is a transmission shaft, 23 is a mounting tube, 3 is a fixed hook device, 31 is a first lifting mechanism, 32 is a hook shaft, 4 is a side excavation device, 5 is a left and right lateral movement device, 51 is a mobile box, 52 is a first drive mechanism, 53 is a guide wheel, 6 is a longitudinal moving device, 61 is a second drive mechanism, 62 is a second lifting mechanism, 63 is a guide rail, 64 is a guide column frame, and 7 is a frame. DETAILED DESCRIPTION

[0024] In order to make the technical solutions and advantages of the embodiments of the present application more clear, the following Figure 1-5The exemplary embodiments of the present application are further described in detail. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0025] In the process of realizing the present application, the inventors found that in the existing circulating chain excavation device, the other end of the undercutting device and the excavation chain mechanism of the undercutting device are in a cantilever state when working, which makes it difficult to ensure the stability of the entire undercutting device. Not only will it cause damage to the entire undercutting device during operation, but it will also affect the construction accuracy and work progress to a certain extent. Moreover, the existing circulating chain excavation device requires manual adjustment of the length of the horizontal guide groove, change of the excavation width, etc., and a large number of manual labor is required to carry out closing excavation and backfilling at the beginning and end of the operation. Before and after the excavation, the bottom beam needs to be docked, installed, and dismantled, which consumes a lot of workers' physical strength and increases the operation time of the entire work section.

[0026] In view of the above problems, the present application provides a mainline excavation device suitable for the bottom of railway ballast sleepers, as shown in the attached Figure 1 , 2 As shown, it includes a frame 7, on which a longitudinal moving device 6 is slidably connected, a guide column frame 64 is provided below the longitudinal moving device 6, and a left and right lateral moving device 5 which can slide vertically along its guide column is installed in the guide column frame 64, and a main line excavation device is installed on both sides of the left and right lateral moving devices 5, respectively. The main line excavation device includes a rotating sleeve device 2 and a fixed hook device 3 which are respectively arranged at the two ends of the same side of the left and right lateral moving devices 5, and an undercut device 1 is provided between the rotating sleeve device 2 and the fixed hook device 3, and the output end of the rotating sleeve device 2 is transmission-connected to the input end of one end of the undercut device 1, and the other end of the undercut device 1 is connected to the fixed hook device 3.

[0027] Furthermore, as attached Figure 2 As shown, the two main-line excavation devices installed on both sides of the left and right transverse moving devices 5 are symmetrical about the center of the left and right transverse moving devices 5, that is, the rotating sleeve device 2 and the fixed hook device 3 on the same side are symmetrical with the rotating sleeve device 2 and the fixed hook device 3 on the other side about the center of the left and right transverse moving devices 5.

[0028] Furthermore, the horizontal heights of the two mainline excavation devices installed on both sides of the left and right transverse movement devices 5 may be inconsistent, that is, the bottom cutting devices 1 on both sides are designed separately in the upper and lower parts of the same section, which can effectively improve the excavation efficiency and appropriately adjust the excavation height.

[0029] In specific implementation, the longitudinal moving device 6 can slide left and right on the frame 7, driving the left and right transverse moving devices 5 to slide left and right, and the left and right transverse moving devices 5 can slide in the vertical direction relative to the moving device 6, thereby moving the mainline excavation device to the construction area. The left and right transverse moving devices 5 and the longitudinal moving device 6 cooperate with each other, so that the undercutting device 1 can move up and down and left and right on the frame 7, and can adapt to the excavation of various railway turnout areas and mainline areas. Before the excavation operation, the cantilever end of the undercutting device 1 is fixed by the fixed hook device 3 to form a circular frame to improve the stability of the undercutting device 1, and the output end of the rotary sleeve device 2 drives the undercutting device 1 to perform the excavation operation.

[0030] As a preferred solution, as shown in the attached Figure 2 As shown, the fixed hook device 3 includes a first lifting mechanism 31, the base of the first lifting mechanism 31 is arranged on the left and right transverse movement device 5, the output end of the first lifting mechanism 31 is a hook shaft 32 that can move vertically relative to the base, and the bottom of the hook shaft 32 is connected to the other end of the bottom cutting device 1.

[0031] Furthermore, the first lifting mechanism 31 includes a hydraulic cylinder, a sleeve mechanism, etc. The hydraulic cylinder body is installed on the sleeve, and the hydraulic cylinder rod is connected to the hook shaft 32 through a connecting seat. The hydraulic cylinder can drive the hook shaft 32 to move up and down by telescoping. The hook shaft 32 has a hook-shaped mechanism at its shaft end for connecting to the bottom cutting device 1.

[0032] During specific implementation, the first lifting mechanism 31 is driven, and the hook shaft 32 extends vertically downward relative to the base to a specified position, and then connects with the undercut device 1 to form an annular frame, thereby improving the stability of the undercut device 1 .

[0033] As a preferred solution, as shown in the attached Figure 2 As shown, the bottom cutting device 1 includes a support plate 12, and the two ends of the support plate 12 are rotatably connected with a driving sprocket and a driven sprocket respectively. An excavating chain 11 is wound around the outer side of the support plate 12, and the excavating chain 11 is meshed with the driving sprocket and the driven sprocket. The output end of the rotating sleeve device 2 is transmission-connected to the driving sprocket, and a fixed seat 13 is provided on one end of the support plate 12 located at the driven sprocket. One end of the fixed seat 13 is rotatably connected to the support plate 12, and the other end of the fixed seat 13 is connected to the bottom of the hook shaft 32.

[0034] In the specific implementation, the hook shaft 32 extends downward to the specified position and is connected to the other end of the fixed seat 13 to complete the circular frame structure. The output end of the rotating sleeve device 2 drives the active sprocket, which drives the driven sprocket to rotate through the excavation chain 11 to perform excavation operations.

[0035] As a preferred solution, as shown in the attached Figure 3As shown, the rotary sleeve device 2 includes a mounting cylinder 23, the bottom of which is connected to the support plate 12, a rotary drive mechanism 21 is provided on the upper portion of the mounting cylinder 23, the output end of the rotary drive mechanism 21 is transmission-connected to the side wall of the mounting cylinder 23, a motor is provided on the top of the mounting cylinder 23, a transmission shaft 22 is connected to the output end of the motor, the transmission shaft 22 is sleeved inside the mounting cylinder 23, and the bottom of the transmission shaft 22 is connected to the driving sprocket.

[0036] Furthermore, the rotary drive mechanism 21 may include a hydraulic cylinder, a chain, a sprocket, etc., and is connected to the undercut device through a mounting tube 23, and its function is to drive the undercut device 1 to rotate; the motor may be a hydraulic motor, which is responsible for driving the transmission shaft 22 to rotate.

[0037] During the specific implementation, the output end of the rotary drive mechanism 21 drives the side wall of the mounting tube 23 to rotate it, thereby driving the support plate 23 and the entire bottom cutting device 1 to rotate, so as to achieve the purpose of adjusting the excavation angle. Since one end of the fixed seat 13 is rotatably connected to the support plate 12, after the annular frame structure is completed, the support plate 12 can still rotate around the mounting tube 23 by a certain angle; the output end of the motor drives the transmission shaft 22 to rotate, and transmits power to the active sprocket, thereby driving the bottom cutting device 1 to perform excavation operations.

[0038] As a preferred solution, as shown in the attached Figure 5 As shown, mobile boxes 51 are installed on both sides of the left and right transverse moving devices 5, and main-line excavation devices are installed on the two mobile boxes 51. The mobile boxes 51 on both sides of the left and right transverse moving devices 5 are respectively provided with first driving mechanisms 52, and the first driving mechanisms 52 are connected to the mobile boxes 51. The first driving mechanisms 52 can drive the mobile boxes 51 to make horizontal lateral movements relative to the two sides of the left and right transverse moving devices 5.

[0039] Furthermore, the first driving mechanism 52 can be installed inside the movable box 51 , and the movable box 51 can adjust the left and right transverse movement device 5 in the width direction through the first driving mechanism 52 .

[0040] In a specific implementation, the first driving mechanisms 52 on both sides of the left and right transverse moving devices 5 can respectively drive the movable box 51 on the corresponding side to make it move horizontally relative to the two sides of the left and right transverse moving devices 5, thereby making the main-line excavation devices installed on the movable boxes 51 on both sides relatively move away from or closer to each other, thereby achieving the purpose of adjusting the width direction of the bottom cutting device 1.

[0041] As a preferred solution, as shown in the attached Figure 4As shown, guide rails 63 are horizontally installed on both sides of the frame 7, and a second driving mechanism 61 is also installed on the frame 7. The second driving mechanism 61 drives the longitudinal moving device 6 to slide on the frame 7 along the guide rails 63. A second lifting mechanism 62 is provided on the top of the longitudinal moving device 6. The output end of the second lifting mechanism 62 is connected to the top of the left and right transverse moving devices 5. A plurality of guide wheels 53 are also installed on the left and right transverse moving devices 5. The guide wheels 53 are slidably connected to the guide posts on the guide post frame 64.

[0042] Furthermore, the second driving mechanism 61 may include a hydraulic cylinder, a connecting seat, etc. The cylinder body is installed on the frame 7, and the cylinder rod is installed on the guide column frame 64. The guide column frame 64 is driven to move on the guide rail 63 by the extension and contraction of the hydraulic cylinder; the second lifting mechanism 62 may include a hydraulic cylinder, a mounting seat, etc. The cylinder rod of the second lifting mechanism is connected to the left and right transverse movement devices 5. Under the guiding action of the guide wheel 53 of the left rear transverse movement device 5 in the guide column frame 64, the left and right transverse movement devices 5 can be realized in the up and down directions.

[0043] During specific implementation, the output end of the second driving mechanism 61 is extended and retracted, driving the guide column frame 64 to move on the guide rail 63, so that the left and right lateral movement devices 5 can be moved in the front and rear directions, thereby adjusting the position of the bottom cutting device 1 in the longitudinal direction of the frame 7; the output end of the second lifting mechanism 62 is extended and retracted, driving the left and right lateral movement devices 5 to move vertically, cooperating with the guiding effect of the guide wheel 53 in the guide column frame 64, to realize the vertical movement of the left and right lateral movement devices 5, thereby adjusting the vertical position of the bottom cutting device 1.

[0044] As a preferred solution, as shown in the attached Figure 1 As shown, a side excavation device 4 is also installed on the other end of the frame 7 relative to the mainline excavation device, and the side excavation device 4 is connected to the frame 7 through a cylinder.

[0045] Specifically, the side excavation device 4 is arranged at the root of the bottom cutting device 1 (in front of the rotating sleeve device 2), and the side excavation device 4 can be moved left and right and up and down under the action of the oil cylinder; the bottom cutting device 1 moves forward and backward, and cooperates with the side excavation device 4 to transport the ballast excavated from the bottom of the pillow to the side excavation device 4; the side excavation device 4 is responsible for excavating the ballast on the side of the track and transporting the ballast excavated by the bottom cutting device 1.

[0046] When the undercut device is operating, the hook shaft of the fixed hook device is connected to the fixed seat on the undercut device support plate to avoid forming a cantilever beam structure and form a ring frame structure, which can effectively improve the stability of the undercut device when it is working.

[0047] During the screening operation, the frame moves in the working direction, and the guide column frame in the longitudinal moving device can move forward and backward through the driving mechanism fixed on the frame and the guide rail installed on the frame. After the left and right lateral moving devices installed in the guide column frame move to the working position together with the guide column frame, the left and right lateral moving devices drive the bottom cutting device to move left and right to a suitable position, and the left and right lateral moving devices can move up and down in the guide column frame through the second lifting mechanism.

[0048] During the track lifting operation, the frame moves in the working direction, the undercut device is installed on the rotary sleeve device, and the undercut device is rotated by the cylinder chain on the rotary sleeve.

[0049] The present application provides a mainline excavation device suitable for the bottom of railway ballast pillows. Compared with the existing excavation devices, the fixed hook device and the bottom cutting device are used in conjunction with each other, which can not only meet the excavation requirements of ballast, but also form a circular frame to ensure the stability of the bottom cutting device; the bottom cutting device can freely rotate the angle through the rotary drive mechanism on the rotary sleeve device; the left and right lateral movement device can realize the free adjustment of the excavation width of the bottom cutting device through the first drive mechanism; the bottom cutting device can realize the position adjustment in the vertical direction and the longitudinal direction through the left and right lateral movement device and the longitudinal movement device. The present application does not require manual closing excavation, bottom beam installation and removal and other preparatory work before the operation, and can automatically adjust the swing angle, lifting height, excavation depth and other actions of the excavation device, can efficiently and quickly complete the pre-excavation work, and can also ensure the excavation quality of the bottom ballast pillow, which has strong practicality.

[0050] This embodiment also provides an excavation vehicle, including an excavation device as provided in any of the above contents, which has the same technical effect as the above-mentioned excavation device.

[0051] In the description of the present application, it should be understood that the terms "longitudinal", "lateral", "length", "width", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0055] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A mainline excavation device suitable for railway ballast sleeper bottom, characterized in that: The invention comprises a vehicle frame (7), wherein a longitudinal moving device (6) is slidably connected to the vehicle frame (7), a guide column frame (64) is provided below the longitudinal moving device (6), a left and right lateral moving device (5) which can slide vertically along its guide column is installed in the guide column frame (64), and a mainline excavation device is installed on both sides of the left and right lateral moving devices (5), respectively, and the mainline excavation device comprises a rotating sleeve device (2) and a fixed hook device (3) which are respectively arranged at the two ends of the same side of the left and right lateral moving devices (5), and an undercut device (1) is provided between the rotating sleeve device (2) and the fixed hook device (3), and the output end of the rotating sleeve device (2) is transmission-connected to the input end of one end of the undercut device (1), and the other end of the undercut device (1) is connected to the fixed hook device (3).

2. The mainline excavation device suitable for the bottom of railway ballast sleeper according to claim 1, characterized in that: The fixed hook device (3) comprises a first lifting mechanism (31), the base of the first lifting mechanism (31) is arranged on the left and right lateral movement device (5), the output end of the first lifting mechanism (31) is a hook shaft (32) that can move vertically relative to the base, and the bottom of the hook shaft (32) is connected to the other end of the undercut device (1).

3. The mainline excavation device applicable to the bottom of railway ballast sleeper according to claim 2, characterized in that: The undercut device (1) comprises a support plate (12), the two ends of which are rotatably connected to a driving sprocket and a driven sprocket respectively, an excavating chain (11) is wound around the outer side of the support plate (12), the excavating chain (11) is meshed with the driving sprocket and the driven sprocket, and the output end of the rotary sleeve device (2) is transmission-connected to the driving sprocket.

4. The mainline excavation device applicable to the bottom of railway ballast sleeper according to claim 3, characterized in that: A fixing seat (13) is provided on one end of the driven sprocket on the support plate (12), one end of the fixing seat (13) is rotatably connected to the support plate (12), and the other end of the fixing seat (13) is connected to the bottom of the hook shaft (32).

5. The mainline excavation device applicable to the bottom of railway ballast sleeper according to claim 3, characterized in that: The rotary sleeve device (2) comprises a mounting tube (23), the bottom of which is connected to the support plate (12), a rotary drive mechanism (21) is provided on the top of the mounting tube (23), and an output end of the rotary drive mechanism (21) is drivingly connected to a side wall of the mounting tube (23).

6. The mainline excavation device applicable to the bottom of railway ballast sleeper according to claim 5, characterized in that: A motor is provided at the top of the installation cylinder (23); an output end of the motor is connected to a transmission shaft (22); the transmission shaft (22) is sleeved inside the installation cylinder (23); and a bottom of the transmission shaft (22) is connected to the driving sprocket.

7. The mainline excavation device applicable to the bottom of railway ballast sleeper according to claim 1, characterized in that: A movable box (51) is installed on both sides of the left and right transverse moving device (5), and a mainline excavation device is installed on the two movable boxes (51). The movable boxes (51) on both sides of the left and right transverse moving device (5) are respectively provided with a first driving mechanism (52), and the output end of the first driving mechanism (52) is connected to the movable box (51). The first driving mechanism (52) can drive the movable box (51) to perform horizontal lateral movement relative to the two sides of the left and right transverse moving device (5).

8. The mainline excavation device applicable to the bottom of railway ballast sleeper according to claim 1, characterized in that: Guide rails (63) are respectively installed horizontally on both sides of the frame (7), and a second driving mechanism (61) is also installed on the frame (7). The second driving mechanism (61) drives the longitudinal moving device (6) to slide on the frame (7) along the guide rails (63).

9. The mainline excavation device applicable to the bottom of railway ballast sleeper according to claim 8, characterized in that: A second lifting mechanism (62) is provided at the top of the longitudinal moving device (6), and an output end of the second lifting mechanism (62) is connected to the top of the left and right transverse moving device (5). A plurality of guide wheels (53) are also installed on the left and right transverse moving device (5), and the guide wheels (53) are slidably connected to the guide columns on the guide column frame (64).

10. The mainline excavation device applicable to the bottom of railway ballast sleeper according to claim 1, characterized in that: A side excavation device (4) is also installed on the vehicle frame (7) at the other end relative to the mainline excavation device, and the side excavation device (4) is connected to the frame (7) via an oil cylinder.

11. An excavation vehicle, comprising: A mainline excavation device suitable for the bottom of railway ballast sleepers as described in any one of claims 1-10.

Images