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

Abstract

The embodiment of the utility model 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, and is related to the efficiency and quality of ballast cleaning. At present, domestic railway ballast uses the existing circular chain excavation device for pillow bottom cleaning, which requires manual adjustment of the length of the horizontal guide trough and change of the excavation width. In addition, a large number of workers are required to participate in the excavation and backfilling of the closing mouth at the beginning and end of the operation. The excavation of the closing mouth requires manpower, and the docking, installation, and removal of the bottom beam must be carried out before and after the excavation. This not only consumes a lot of workers' physical strength but also increases the operation time of the entire section.

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

[0005] A first embodiment of the present application provides a mainline excavation device suitable for the bottom of railway ballast sleepers, including a frame, a longitudinal moving device being slidably connected to the frame, a guide column frame being provided below the longitudinal moving device, left and right lateral moving devices being installed in the guide column frame and capable of vertically sliding along their guide columns, a mainline excavation device being installed on both sides of the left and right lateral moving devices, respectively, the mainline excavation device including a rotary sleeve device and a fixed hook device respectively arranged at the two ends of the same side of the left and right lateral moving devices, an undercutting device being provided between the rotary sleeve device and the fixed hook device, the output end of the rotary 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, the two ends of which are rotatably connected to a driving sprocket and a driven sprocket respectively, 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 rotary sleeve device is connected to the driving sprocket transmission.

[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 includes a mounting cylinder, the bottom of the mounting cylinder is connected to the support plate, the upper part of the mounting cylinder 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 cylinder.

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

[0011] Furthermore, mobile boxes are installed on both sides of the left and right transverse moving devices, and the two mobile boxes are respectively installed with main line excavation devices. 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 mechanism is connected to the mobile boxes. The first driving mechanism 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 other end of the vehicle frame relative to the mainline excavation device, and the side excavation device is connected to the frame through a cylinder.

[0015] The second embodiment 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 undercutting device cooperate with each other to form a circular frame, thereby avoiding the cantilever state of the excavation chain mechanism and the support plate when working, and improving the excavation stability of the undercutting device; the present application utilizes a longitudinal moving device and a left and right lateral moving device to enable the undercutting device to rotate up and down, left and right, and along the vertical direction in the frame, and can adapt to the excavation of various railway switch 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 suitable for the bottom of railway ballast sleepers 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 the 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 movement device assembly structure provided in an embodiment of the present application.

[0023] Among them, 1 is the bottom cutting device, 11 is the excavation chain, 12 is the support plate, 13 is the fixed seat, 2 is the rotary sleeve device, 21 is the rotary drive mechanism, 22 is the transmission shaft, 23 is the installation cylinder, 3 is the fixed hook device, 31 is the first lifting mechanism, 32 is the hook shaft, 4 is the side excavation device, 5 is the left and right lateral movement device, 51 is the mobile box, 52 is the first drive mechanism, 53 is the guide wheel, 6 is the longitudinal moving device, 61 is the second drive mechanism, 62 is the second lifting mechanism, 63 is the guide rail, 64 is the guide column frame, and 7 is the 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 a part of the embodiments of the present application, and are not an exhaustive list of all embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other in the absence of conflict.

[0025] In the process of realizing the present application, the inventors found that the existing circulating chain excavation device has an undercutting device and an undercutting device excavation chain mechanism, and the other end is 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 amount of manual participation is required at the beginning and end of the operation to carry out closing excavation and backfilling. Before and after 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 invention provides a mainline excavation device suitable for the bottom of railway ballast sleepers, as shown in the attached figure. 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 that 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. The main line excavation device includes a rotary sleeve device 2 and a fixed hook device 3 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 rotary sleeve device 2 and the fixed hook device 3. The output end of the rotary 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 rotary sleeve device 2 and the fixed hook device 3 on the same side are symmetrical with the rotary 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 devices 5 may be inconsistent, that is, the bottom cutting devices 1 on both sides are designed as two separate upper and lower devices on the same section, which can effectively improve the excavation efficiency and appropriately adjust the excavation height.

[0029] In practice, the longitudinal movement device 6 can slide left and right on the vehicle frame 7, driving the left and right transverse movement devices 5 to slide left and right. The left and right transverse movement devices 5 can then slide vertically relative to the movement device 6, thereby moving the mainline excavation device to the construction area. The left and right transverse movement devices 5 and the longitudinal movement device 6 cooperate with each other to enable the undercutting device 1 to move up and down and left and right on the vehicle frame 7, adapting to excavation in various railway turnout areas and mainline areas. Before excavation, the cantilever end of the undercutting device 1 is fixed with the fixed hook device 3 to form a circular frame, improving the stability of the undercutting device 1. 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 set 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 undercutting device 1 to form an annular frame, thereby improving the stability of the undercutting device 1 .

[0033] As a preferred solution, as shown in the attached Figure 2 As shown, the undercutting device 1 includes a support plate 12, and the two ends of the support plate 12 are rotatably connected to the driving sprocket and the driven sprocket respectively. An excavating chain 11 is wrapped around the outside of the support plate 12, and the excavating chain 11 is engaged with the driving sprocket and the driven sprocket. The output end of the rotary sleeve device 2 is transmission-connected to the driving sprocket, and a fixed seat 13 is provided on one end of the driven sprocket on the support plate 12. 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] During 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 the mounting cylinder 23 is connected to the support plate 12, the upper part of the mounting cylinder 23 is provided with a rotary drive mechanism 21, the output end of the rotary drive mechanism 21 is transmission-connected to the side wall of the mounting cylinder 23, the top of the mounting cylinder 23 is provided with a motor, the output end of the motor is connected to a transmission shaft 22, 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 be connected to the undercutting device through a mounting tube 23, and its function is to drive the undercutting device 1 to rotate; the motor may be a hydraulic motor, responsible for driving the transmission shaft 22 to rotate.

[0037] During specific implementation, the output end of the rotary drive mechanism 21 drives the side wall of the mounting cylinder 23 to rotate it, thereby driving the support plate 23 and the entire undercutting device 1 to rotate, thereby achieving 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 cylinder 23 by a certain angle; the output end of the motor drives the transmission shaft 22 to rotate, transmits power to the active sprocket, thereby driving the undercutting device 1 to perform excavation operations.

[0038] As a preferred solution, as shown in the attached Figure 5 As shown, a mobile box 51 is installed on both sides of the left and right transverse movement devices 5, and a main line excavation device is installed on the two mobile boxes 51. The mobile boxes 51 on both sides of the left and right transverse movement devices 5 are respectively provided with a first driving mechanism 52. The first driving mechanism 52 is connected to the mobile box 51. The first driving mechanism 52 can drive the mobile box 51 to make horizontal lateral movements relative to the two sides of the left and right transverse movement 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] During 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, so that it can 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 or closer, 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 columns on the guide column 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 vehicle 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, and cooperating with the guiding effect of the guide wheel 53 in the guide column frame 64, the vertical movement of the left and right lateral movement devices 5 is realized, thereby adjusting the position of the bottom cutting device 1 in the vertical direction.

[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 undercutting device 1 (in front of the rotary sleeve device 2), and can move left and right and up and down under the action of the oil cylinder; the undercutting 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 undercutting device 1.

[0046] When the undercutting device is operating, the hook shaft of the fixed hook device is connected to the fixed seat on the undercutting device support plate, avoiding the formation of a cantilever beam structure and forming a ring frame structure, which can effectively improve the stability of the undercutting device during operation.

[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. The left and right lateral moving devices installed in the guide column frame move to the working position together with the guide column frame, and the left and right lateral moving devices drive the undercutting device to move left and right to the appropriate position. 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 vehicle frame moves in the working direction, and the undercut device is installed on the rotary sleeve device. The undercut device rotates at an angle through the oil cylinder chain on the rotary sleeve.

[0049] The present application provides a mainline excavation device suitable for the bottom of railway ballast sleepers. 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 the 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 free adjustment of the excavation width of the bottom cutting device through the first drive mechanism. The bottom cutting device can realize position adjustment in the vertical and longitudinal directions through the left and right lateral movement device and the longitudinal movement device. Before the operation of the present application, there is no need for manual closing excavation, bottom beam installation and removal and other preparatory work. The swing angle, lifting height, excavation depth and other actions of the excavation device can be automatically adjusted. The pre-excavation work can be completed efficiently and quickly, and the excavation quality of the ballast bottom sleeper can be guaranteed. It 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 excavation device.

[0051] In the description of this application, it should be understood that the terms "longitudinal", "transverse", "length", "width", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this 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 cannot be understood as a limitation on this application.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0053] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections, electrical connections, or communication; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0054] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional 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 that fall within the scope of the present application.

[0055] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is 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. The mainline excavation device comprises a rotary 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), an undercut device (1) is provided between the rotary sleeve device (2) and the fixed hook device (3), the output end of the rotary 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 for railway ballast sleeper bottom 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 traverse 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 for railway ballast sleeper bottom according to claim 2, characterized in that: The undercut device (1) comprises a support plate (12), the two ends of the support plate (12) are rotatably connected to a driving sprocket and a driven sprocket respectively, an excavation chain (11) is wound around the outer side of the support plate (12), the excavation chain (11) is engaged 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 for railway ballast sleeper bottom according to claim 3 is 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 suitable for railway ballast sleeper bottom according to claim 3, characterized in that: The rotary sleeve device (2) comprises 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), and an output end of the rotary drive mechanism (21) is transmission-connected to a side wall of the mounting cylinder (23).

6. The mainline excavation device for railway ballast sleeper bottom according to claim 5, characterized in that: A motor is provided on 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 the bottom of the transmission shaft (22) is connected to the driving sprocket.

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

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

9. The mainline excavation device for railway ballast sleeper bottom according to claim 8, characterized in that: A second lifting mechanism (62) is provided on 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 sleepers 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 vehicle frame (7) via an oil cylinder.

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

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