Steel rail maintenance inspection vehicle based on single-person operation

Abstract

The invention provides a steel rail maintenance inspection vehicle based on single-person operation, and relates to the technical field of steel rail inspection, the steel rail maintenance inspection vehicle comprises an inspection vehicle body, monitoring devices are fixedly arranged at the front ends of the two sides of the inspection vehicle body, monitoring frames are slidably arranged below the interiors of the monitoring devices, and electric cylinders are arranged between the tops of the monitoring frames and the monitoring devices to provide up-down driving; front view cameras and vertical view cameras are fixedly arranged on the inner walls of the two sides of the monitoring device. Track measuring devices are fixedly arranged on the rear portions of the two sides of the inspection vehicle body. The automatic nut tightening device has the function of automatically tightening a nut, can lock the nut, can move and be in butt joint with the outside of the nut through the nut shaft sleeve, can keep transmission in the moving process, and starts the servo motor to drive the transmission worm, the driven worm gear, the rotary transmission sleeve and the nut shaft sleeve to rotate, so that the angle of the nut shaft sleeve can be adjusted; the nut shaft sleeve can be clamped outside the nut in cooperation with the acting force of the sleeve air cylinder, and the nut can be tightened by continuously rotating the nut shaft sleeve.

Description

Technical Field

[0001] The invention relates to the technical field of rail inspection, and in particular to a rail maintenance inspection vehicle based on single-person operation. Background Art

[0002] The top of the train rail carries trains for a long time and frequently, so it needs to ensure that its own strength is sufficient. Long-term load-bearing or insufficient strength will cause deformation, affecting the safety of the train. Therefore, regular protection is required. The rails are positioned with bolts. The vibration generated when the train passes may cause the nuts to loosen, so inspections are required to tighten the loose nuts.

[0003] The inspection vehicles currently used have the following disadvantages: 1. Using high-definition photography components and capture programs to compare images is costly and requires the inspection vehicle to drive slowly, resulting in slow inspection speed, inconvenience in quick inspection, and lack of inspection functions that can quickly and continuously conduct physical inspections; 2. It is inconvenient to automatically tighten the loosened nuts to achieve precise maintenance; 3. Rail nuts may rust or deform if left outdoors for a long time, and conventional fastening structures are not convenient for lubrication. Summary of the invention

[0004] In view of this, the present invention aims at addressing the deficiencies in the above-mentioned prior art and provides a rail maintenance inspection vehicle based on single-person operation.

[0005] The present invention provides a rail maintenance inspection vehicle based on single-person operation, which specifically includes: an inspection vehicle body, wherein track wheels are rotatably arranged on the front and rear sides of the bottom of the inspection vehicle body, a gearbox is fixedly arranged on the front side of the bottom of the inspection vehicle body, the front track wheels are transmission-connected to the gearbox, and a motor for driving the vehicle is arranged outside the gearbox; monitoring devices are fixedly arranged on the front ends of both sides of the inspection vehicle body, monitoring frames are slidably arranged on the lower part of the monitoring devices, and electric cylinders are arranged between the top of the monitoring frame and the monitoring device to provide up and down driving; forward-looking cameras and vertical-looking cameras are fixedly arranged on the inner walls of both sides of the monitoring device; and fixed rear cameras are arranged on both sides of the inspection vehicle body. There is a track measuring device, and a track measuring electric cylinder is fixedly arranged in the middle of the top of the track measuring device, and a track measuring device is fixedly arranged at the telescopic end of the track measuring electric cylinder; the bottom sides of the track measuring device extend downward, and the inner walls of the extensions are fixedly connected with two groups of gas telescopic rods, and the telescopic ends of the gas telescopic rods are fixedly arranged with track measuring wheel frames, and rail-adhering rollers are rotatably arranged in the rail measuring wheel frames; thread tighteners are fixedly arranged at both ends of the rear side of the inspection vehicle body, and a transmission frame is fixedly arranged on the outside of the thread tightener, and a rotating transmission sleeve is rotatably arranged in the transmission frame to cooperate with the bearing, and a driven worm gear is fixedly arranged on the outside of the rotating transmission sleeve; a nut shaft sleeve for tightening the nut is slidably arranged in the middle of the rotating transmission sleeve.

[0006] Optionally, an inspection window is provided on the front side of the inspection vehicle body, and acrylic transparent glass is provided in the inspection window; lighting lamps are fixedly provided at both ends of the front side of the inspection vehicle body; and a photovoltaic panel is fixedly provided on the top of the inspection vehicle body.

[0007] Optionally, a wrecker is fixedly provided on the front side of the inspection vehicle body, the front side of the wrecker is tilted downward, and the width of the wrecker exceeds the interval between the track wheels on both sides.

[0008] Optionally, two groups of through grooves are opened on both sides of the upper part of the track detector, and solenoid valves are arranged in the through grooves; a square groove is opened on the upper rear side of the track detector, and an air pump is fixedly arranged in the square groove, and the air pump is connected to the two groups of solenoid valves by pipelines.

[0009] Optionally, the solenoid valve is connected to the gas telescopic rod through a pipeline, and the pipeline is located at the position of the through groove and is also connected to a pressure sensor.

[0010] Optionally, a rear view camera is fixedly arranged on the rear side of the track measuring device; the lenses of the rear view camera, the front view camera and the vertical view camera are all inclined toward the rail bolts, and searchlights are arranged around the lenses of the rear view camera, the front view camera and the vertical view camera.

[0011] Optionally, a transmission worm is rotatably arranged in the middle of the transmission frame, a servo motor is fixedly arranged on the outside of the tightener, the servo motor is transmission-connected to the transmission worm; the transmission worm is transmission-connected to the driven worm gear; a support frame is fixedly arranged on the top of the transmission frame, the top of the support frame turns outward, a sleeve cylinder is fixedly arranged on the bottom of the turning point, a propulsion seat is fixedly arranged at the telescopic end of the sleeve cylinder, the propulsion seat is slidingly connected to the support frame; a bearing is set to rotately connect the propulsion seat and the top of the nut sleeve.

[0012] Optionally, a lubricating oil tank is fixedly arranged on the rear side of the inspection vehicle body, an oil filling pump is connected to the bottom of the lubricating oil tank, and an oil filling pipe is connected to the bottom of the oil filling pump; the two side branches of the oil filling pipe turn downward, and both ends of the oil filling pipe are located in the middle of the nut sleeve.

[0013] The beneficial effects are as follows: 1. The present invention provides a function of automatically tightening the nut, which can lock the nut. The nut sleeve can be moved and connected to the outside of the nut, and the transmission can be maintained during the movement. The servo motor is started to drive the transmission worm, the driven worm gear, the rotating transmission sleeve and the nut sleeve to rotate, so that the angle of the nut sleeve can be adjusted. With the action of the sleeve cylinder, the nut sleeve can be clamped on the outside of the nut, and the nut sleeve can be tightened by continuing to rotate.

[0014] 2. The present invention can also lubricate the nut. If the screw is rusted or deformed and the nut cannot rotate normally, the nut sleeve can be repeatedly rotated to try to tighten it. In addition, an oil injection pump is used to inject oil from the oil injection pipe and the lubricating oil is poured directly on the outside of the screw to achieve lubrication, thereby ensuring the tightening of the nut.

[0015] 3. The present invention monitors the deformation degree of the rails through the gas telescopic rod. The rail-contacting rollers can move in accordance with the rails and automatically adapt to the changes according to the changes in the shape of the rails. If changes occur, such as an increase in the spacing between the rail-contacting rollers on both sides, the internal pressure of the gas telescopic rod will increase. The pressure is fed back through the pressure sensor and can be prompted to the maintenance personnel. By simultaneously detecting the degree of change of the two rails, it can be determined whether the spacing between the rails is normal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the present invention is shown; Figure 2 The isometric structural diagram of an embodiment of the present invention is shown; Figure 3 A schematic diagram of the front side tilt structure of an embodiment of the present invention is shown; Figure 4 A schematic diagram of the rear side tilt structure of an embodiment of the present invention is shown; Figure 5 A schematic diagram of the working state structure of an embodiment of the present invention is shown; Figure 6 A schematic diagram of a three-dimensional cross-sectional structure of a track measuring device in an embodiment of the present invention is shown; Figure 7 A schematic diagram of the three-dimensional structure of a track detector in an embodiment of the present invention is shown; Figure 8 A schematic diagram of the three-dimensional structure of a wire tightener in an embodiment of the present invention is shown; Fig. 9 A schematic diagram of the tilt structure of the transmission frame in an embodiment of the present invention is shown.

[0017] Reference numerals list 1. Inspection vehicle body; 101. Inspection window; 102. Track wheel; 103. Gearbox; 104. Lighting lamp; 105. Photovoltaic panel; 2. Obstruction remover; 3. Monitoring device; 301. Monitoring frame; 302. Front view camera; 303. Vertical view camera; 4. Track measuring device; 401. Track measuring electric cylinder; 402. Track measuring device; 403. Through slot; 404. Solenoid valve; 405. Air pump; 406. Air telescopic rod ; 407, track measuring wheel frame; 408, track roller; 409, pressure sensor; 410, rear view camera; 5, thread tightener; 501, transmission frame; 502, transmission worm; 503, servo motor; 504, rotating transmission sleeve; 505, driven worm gear; 506, nut sleeve; 507, support frame; 508, sleeve cylinder; 509, thrust seat; 6, lubricating oil tank; 7, oil filling pump; 8, oil filling pipe. DETAILED DESCRIPTION

[0018] In order to make the purpose, scheme and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention.

[0019] Example 1: Please refer to the attached drawings in the specification. Figures 1 to 9 As shown: The present invention proposes a rail maintenance inspection vehicle based on single-person operation, comprising: an inspection vehicle body 1, track wheels 102 are rotatably arranged on the front and rear sides of the bottom of the inspection vehicle body 1, a gearbox 103 is fixedly arranged on the front side of the bottom of the inspection vehicle body 1, the front track wheel 102 is transmission-connected with the gearbox 103, and a motor for driving the vehicle is arranged outside the gearbox 103; monitoring devices 3 are fixedly arranged on the front ends of both sides of the inspection vehicle body 1, monitoring frames 301 are slidingly arranged on the lower part of the monitoring device 3, and an electric cylinder is arranged between the top of the monitoring frame 301 and the monitoring device 3 to provide up and down driving; forward-looking cameras 302 and vertical-looking cameras 303 are fixedly arranged on the inner walls of both sides of the monitoring device 3; track measuring devices 4 are fixedly arranged on the rear of both sides of the inspection vehicle body 1, and the track measuring devices 4 A track measuring electric cylinder 401 is fixedly arranged in the middle of the top, and a track measuring device 402 is fixedly arranged at the telescopic end of the track measuring electric cylinder 401; the bottom sides of the track measuring device 402 extend downward, and the inner walls of the extensions are fixedly connected with two groups of gas telescopic rods 406, and the telescopic ends of the gas telescopic rods 406 are fixedly arranged with track measuring wheel frames 407, and rail-adhering rollers 408 are rotatably arranged in the track measuring wheel frames 407; thread tighteners 5 are fixedly arranged at both ends of the rear side of the inspection vehicle body 1, and a transmission frame 501 is fixedly arranged on the outside of the thread tightener 5, and a rotating transmission sleeve 504 is rotatably arranged in the transmission frame 501 to cooperate with the bearing, and a driven worm gear 505 is fixedly arranged on the outside of the rotating transmission sleeve 504; a nut shaft sleeve 506 for tightening the nut is slidably arranged in the middle of the rotating transmission sleeve 504.

[0020] Among them, a patrol window 101 is arranged on the front side of the patrol vehicle body 1, and acrylic transparent glass is arranged in the patrol window 101; lighting lamps 104 are fixedly arranged at both ends of the front side of the patrol vehicle body 1; and a photovoltaic panel 105 is fixedly arranged on the top of the patrol vehicle body 1.

[0021] A wrecker 2 is fixedly provided on the front side of the inspection vehicle body 1 , the front side of the wrecker 2 is tilted downward, and the width of the wrecker 2 exceeds the interval between the track wheels 102 on both sides.

[0022] Among them, two groups of through grooves 403 are opened on both sides above the track detector 402, and solenoid valves 404 are arranged in the through grooves 403; a square groove is opened on the upper rear side of the track detector 402, and an air pump 405 is fixedly arranged in the square groove, and the air pump 405 is connected to the two groups of solenoid valves 404 by pipelines.

[0023] The solenoid valve 404 is connected to the gas telescopic rod 406 through a pipeline, and the pipeline is located at the position of the through groove 403 and is also connected to a pressure sensor 409 .

[0024] Among them, a rear view camera 410 is fixedly installed on the rear side of the track measuring device 4; the lenses of the rear view camera 410, the front view camera 302 and the vertical view camera 303 are all tilted toward the rail bolts, and searchlights are arranged around the lenses of the rear view camera 410, the front view camera 302 and the vertical view camera 303.

[0025] Among them, a transmission worm 502 is rotatably arranged in the middle of the transmission frame 501, and a servo motor 503 is fixedly arranged on the outside of the tightener 5, and the servo motor 503 is transmission-connected to the transmission worm 502; the transmission worm 502 is transmission-connected to the driven worm gear 505; a support frame 507 is fixedly arranged on the top of the transmission frame 501, and the top of the support frame 507 turns outward, and a sleeve cylinder 508 is fixedly arranged at the bottom of the turning point, and a propulsion seat 509 is fixedly arranged at the telescopic end of the sleeve cylinder 508, and the propulsion seat 509 is slidingly connected to the support frame 507; a bearing is set to rotate with the top of the propulsion seat 509 and the nut sleeve 506.

[0026] Among them, a lubricating oil tank 6 is fixedly arranged on the rear side of the inspection vehicle body 1, and an oil filling pump 7 is connected to the bottom of the lubricating oil tank 6, and an oil filling pipe 8 is connected to the bottom of the oil filling pump 7; the two side branches of the oil filling pipe 8 turn downward, and both ends of the oil filling pipe 8 are located in the middle of the nut sleeve 506.

[0027] like Figure 1-5 As shown, the bottom of the inspection vehicle body 1 is integrally provided with two flange structures, and the flanges are used to limit the position. Generally, the inspection vehicle body 1 is supported and placed above the rails by a forklift; In order to ensure barrier-free access, the monitoring frame 301 and the track detector 402 are used as retractable structures. The monitoring frame 301 can be retracted into the monitoring device 3, and the track detector 402 can be retracted into the track detector 4, thereby avoiding collision of various components when moving the inspection vehicle body 1; After the inspection vehicle 1 is placed on the rail, the monitoring frame 301 is lowered to cover the rail. At this time, the forward-looking camera 302 and the vertical-looking camera 303 are aligned with the bolt positions of the rail, and the bolt positions can be monitored through the camera program. If the bolts are found to be seriously loose or lost when the inspection vehicle 1 is moving, the program will feedback to the inside of the inspection vehicle 1, and the monitor inside the inspection vehicle 1 will prompt, and the inspection vehicle 1 will be stopped for maintenance; A manual operation platform is arranged inside the inspection vehicle body 1, a driving mechanism and a braking mechanism are arranged, and an unmanned control program can also be arranged to perform automatic inspection; When the nut needs to be tightened, the position is determined by the rear view camera 410. When the nut sleeve 506 is aligned with the bolt, the sleeve cylinder 508 is started to move the propulsion seat 509 and the nut sleeve 506 downward, and the bottom of the nut sleeve 506 is attached to the top of the nut. Since the nut sleeve 506 and the nut are likely to be misaligned, it is difficult to directly connect them. At this time, the servo motor 503 is started to drive the transmission worm 502 to rotate, and the transmission worm 502 drives the driven worm gear 505 to rotate. The driven worm gear 505 drives the rotating transmission sleeve 504 to rotate, and the rotating transmission sleeve 504 drives the nut sleeve 506 to rotate, so that the angle of the nut sleeve 506 can be adjusted. With the force of the sleeve cylinder 508, the nut sleeve 506 can be clamped on the outside of the nut. Continue to rotate the nut sleeve 506 to tighten it.

[0028] Embodiment 2: Based on Embodiment 1, the inspection can be performed by automatic quantitative mobile tightening. When large-scale maintenance is required, a patrol vehicle is set up within a certain range, and the unmanned control program is used to automatically control each group of nuts using the nut sleeve 506; If the screw is rusted or deformed and the nut cannot rotate normally, the nut sleeve 506 can be repeatedly rotated to try to tighten it; optionally, oil can be injected from the oil injection pipe 8 using the oil injection pump 7, and the lubricating oil can be poured directly on the outside of the screw to achieve lubrication, thereby ensuring the tightening of the nut.

[0029] Embodiment 3: Based on Embodiment 1, the rails may be subjected to deformation detection; the interval between rails is 1435 mm, and deformation may affect train safety; After the rail measuring device 402 is lowered by the rail measuring electric cylinder 401, the electromagnetic valve 404 is opened, and the air pump 405 is used to input air into the gas telescopic rods 406, so that each group of gas telescopic rods 406 is extended, and the rail-attaching rollers 408 are attached to both sides of the rails. After the internal air pressure of the gas telescopic rods 406 is increased to 1.2 times the atmospheric pressure through the monitoring of the pressure sensor 409, the electromagnetic valve 404 and the air pump 405 are closed; the rail-attaching rollers 408 are attached to the rails; During the movement of the inspection vehicle, it automatically adapts to changes in the shape of the rails. If changes occur, such as an increase in the distance between the rail rollers 408 on both sides, the internal pressure of the gas telescopic rod 406 will increase. The pressure is fed back through the pressure sensor 409 and can be prompted to the maintenance personnel. By monitoring the changes in air pressure, the deviation amplitude can be calculated, and then whether the distance between the two rails is normal can be detected.

[0030] Specific usage and function of this embodiment: In the present invention, the bottom of the inspection vehicle body 1 is integrally provided with two flange structures, and the function of the flange is to limit the position. Generally, the inspection vehicle body 1 is placed on the top of the rail by a forklift; In order to ensure barrier-free access, the monitoring frame 301 and the track detector 402 are used as retractable structures. The monitoring frame 301 can be retracted into the monitoring device 3, and the track detector 402 can be retracted into the track detector 4, thereby avoiding collision of various components when moving the inspection vehicle body 1; After the inspection vehicle 1 is placed on the rail, the monitoring frame 301 is lowered to cover the rail. At this time, the forward-looking camera 302 and the vertical-looking camera 303 are aligned with the bolt positions of the rail, and the bolt positions can be monitored through the camera program. If the bolts are found to be seriously loose or lost when the inspection vehicle 1 is moving, the program will feedback to the inside of the inspection vehicle 1, and the monitor inside the inspection vehicle 1 will prompt, and the inspection vehicle 1 will be stopped for maintenance; When the nut needs to be tightened, the position is determined by the rear view camera 410. When the nut sleeve 506 is aligned with the bolt, the sleeve cylinder 508 is started to move the propulsion seat 509 and the nut sleeve 506 downward, and the bottom of the nut sleeve 506 is fitted above the nut. Since the nut sleeve 506 and the nut are likely to be misaligned, it is difficult to directly connect them. At this time, the servo motor 503 is started to drive the transmission worm 502 to rotate, and the transmission worm 502 drives the driven worm gear 505 to rotate. The driven worm gear 505 drives the rotating transmission sleeve 504 to rotate, and the rotating transmission sleeve 504 drives the nut sleeve 506 to rotate, so that the angle of the nut sleeve 506 can be adjusted. With the force of the sleeve cylinder 508, the nut sleeve 506 can be clamped on the outside of the nut; continue to rotate the nut sleeve 506 to tighten; According to the needs, automatic quantitative mobile tightening can be selected. When large-scale maintenance is required, a patrol vehicle is set up within a certain range, and each group of nuts is tightened by the nut sleeve 506 through automatic control by an unmanned control program; If the screw is rusted or deformed so that the nut cannot rotate normally, the nut sleeve 506 can be rotated repeatedly to try to tighten it; optionally, the oil injection pump 7 can be used to inject oil from the oil injection pipe 8, and the lubricating oil can be directly poured onto the outside of the screw to achieve lubrication, thereby ensuring the tightening of the nut; After the track measuring device 402 is lowered by the track measuring electric cylinder 401, the solenoid valve 404 is opened, and air is input into the gas telescopic rods 406 by means of the air pump 405, so that each group of gas telescopic rods 406 are extended, and the rail-contacting rollers 408 are attached to both sides of the rails. After the internal air pressure of the gas telescopic rods 406 is increased to 1.2 times of the atmospheric pressure through the monitoring of the pressure sensor 409, the solenoid valve 404 and the air pump 405 are closed; at this time, the rail-contacting rollers 408 can move in accordance with the rails and automatically adapt to changes according to the changes in the shape of the rails. If changes occur, such as an increase in the distance between the rail-contacting rollers 408 on both sides, the internal pressure of the gas telescopic rods 406 will increase, and the pressure will be fed back through the pressure sensor 409 to prompt the maintenance personnel.

Claims

1. Rail maintenance inspection vehicle based on single-person operation, including: A patrol vehicle (1), wherein track wheels (102) are rotatably arranged at the front and rear sides of the bottom of the patrol vehicle (1), a gearbox (103) is fixedly arranged at the front side of the bottom of the patrol vehicle (1), the front track wheels (102) are transmission-connected to the gearbox (103), and a motor for driving the vehicle is arranged outside the gearbox (103); the patrol vehicle (1) is characterized in that monitoring devices (3) are fixedly arranged at the front ends of both sides of the patrol vehicle (1), a monitoring frame (301) is slidably arranged at the bottom of the monitoring device (3), and an electric cylinder is arranged between the top of the monitoring frame (301) and the monitoring device (3) to provide up and down driving; a forward-looking camera (302) and a vertical-looking camera (303) are fixedly arranged at the inner walls of both sides of the monitoring device (3); a track measuring device (4) is fixedly arranged at the rear of both sides of the patrol vehicle (1), and the top middle of the track measuring device (4) A rail measuring electric cylinder (401) is fixedly provided, and a rail measuring device (402) is fixedly provided at the telescopic end of the rail measuring electric cylinder (401); the bottom sides of the rail measuring device (402) extend downward, and the inner walls of the extensions are fixedly connected with two groups of gas telescopic rods (406); the telescopic ends of the gas telescopic rods (406) are fixedly provided with rail measuring wheel frames (407), and rail-adhering rollers (408) are rotatably provided in the rail measuring wheel frames (407); a tightening device (5) is fixedly provided at both ends of the rear side of the inspection vehicle body (1), a transmission frame (501) is fixedly provided on the outside of the tightening device (5), a rotating transmission sleeve (504) is rotatably provided in the transmission frame (501) in cooperation with a bearing, and a driven worm gear (505) is fixedly provided on the outside of the rotating transmission sleeve (504); a nut shaft sleeve (506) for tightening a nut is slidably provided in the middle of the rotating transmission sleeve (504).

2. The rail maintenance inspection vehicle based on single-person operation as claimed in claim 1, characterized in that: The front side of the inspection vehicle body (1) is provided with an inspection window (101), and acrylic transparent glass is provided in the inspection window (101); lighting lamps (104) are fixedly provided at both ends of the front side of the inspection vehicle body (1); and a photovoltaic panel (105) is fixedly provided on the top of the inspection vehicle body (1).

3. The rail maintenance inspection vehicle based on single-person operation as claimed in claim 1, characterized in that: A barrier remover (2) is fixedly arranged on the front side of the inspection vehicle body (1); the front side of the barrier remover (2) is tilted downward; and the width of the barrier remover (2) exceeds the interval between the track wheels (102) on both sides.

4. The rail maintenance inspection vehicle based on single-person operation as claimed in claim 1, characterized in that: Two groups of through grooves (403) are provided on both sides of the upper part of the track detector (402), and electromagnetic valves (404) are arranged in the through grooves (403); a square groove is provided on the upper rear side of the track detector (402), and an air pump (405) is fixedly arranged in the square groove, and the air pump (405) is connected to the two groups of electromagnetic valves (404) through pipelines.

5. The rail maintenance inspection vehicle based on single-person operation as claimed in claim 4, characterized in that: The solenoid valve (404) is connected to the gas telescopic rod (406) through a pipeline, and the pipeline is located at the position of the through groove (403) and is also connected to a pressure sensor (409).

6. The rail maintenance inspection vehicle based on single-person operation as claimed in claim 1, characterized in that: A rear view camera (410) is fixedly arranged on the rear side of the track measuring device (4); the lenses of the rear view camera (410), the front view camera (302) and the vertical view camera (303) are all inclined towards the rail bolts, and searchlights are arranged around the lenses of the rear view camera (410), the front view camera (302) and the vertical view camera (303).

7. The rail maintenance inspection vehicle based on single-person operation as claimed in claim 1, characterized in that: A transmission worm (502) is rotatably arranged in the middle of the transmission frame (501), a servo motor (503) is fixedly arranged outside the tightener (5), and the servo motor (503) is transmission-connected to the transmission worm (502); the transmission worm (502) is transmission-connected to the driven worm wheel (505); a support frame (507) is fixedly arranged on the top of the transmission frame (501), the top of the support frame (507) is turned outward, a sleeve cylinder (508) is fixedly arranged on the bottom of the turning point, a propulsion seat (509) is fixedly arranged at the telescopic end of the sleeve cylinder (508), and the propulsion seat (509) is slidably connected to the support frame (507); a bearing is provided on the top of the propulsion seat (509) and the nut shaft sleeve (506) for rotational connection.

8. The rail maintenance inspection vehicle based on single-person operation as claimed in claim 1, characterized in that: A lubricating oil tank (6) is fixedly provided on the rear side of the inspection vehicle body (1); an oil filling pump (7) is connected to the bottom of the lubricating oil tank (6); and an oil filling pipe (8) is connected to the bottom of the oil filling pump (7); branches on both sides of the oil filling pipe (8) turn downward, and both ends of the oil filling pipe (8) are located in the middle of the nut shaft sleeve (506).

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