Bottom detection and maintenance device for urban rail transit vehicle

Abstract

The invention relates to the technical field of urban rail transit, in particular to a bottom detection and maintenance device for an urban rail transit vehicle, which solves the problems that the labor intensity of maintainers is high and lifting equipment is difficult to convey to the lower part of the urban rail vehicle, and comprises a maintenance vehicle, an electric jack and a support frame, a limiting column and a positioning column are fixed to the upper end and the lower end of the maintenance car correspondingly and located on the same vertical straight line, a power transmission assembly is installed in the maintenance car, and the input end of the power transmission assembly is connected with an axle of the maintenance car. The positions of the electric jack and the supporting frame can be adjusted in the running process of the maintenance vehicle, so that the electric jack and the supporting frame are inserted below the urban rail vehicle or retracted into the maintenance vehicle from the position below the urban rail vehicle, and the electric jack does not need to be additionally carried; when the supporting frame moves to the position below the urban rail vehicle, the searchlighting assembly can carry out searchlighting on the bottom of the urban rail vehicle.

Description

Technical Field

[0001] The invention relates to the technical field of urban rail transit, and in particular to an underbody detection and maintenance device for urban rail transit vehicles. Background Art

[0002] Urban rail transit vehicles refer to vehicles used in urban rail transit such as subways, light rails, urban express rails, metropolitan express rails, monorails, and trams. Urban rail vehicle maintenance is an important part of ensuring the safe and smooth operation of urban rail transit. Maintenance items include: vehicle appearance inspection, vehicle internal inspection, vehicle external inspection, vehicle electrical inspection, vehicle brake inspection, vehicle wheel set inspection, vehicle trial run, etc.

[0003] Among them, when inspecting the vehicle's exterior, it is necessary to inspect the vehicle's bottom, that is, to inspect the vehicle's electrical box, air source system, traction motor, bearings, grounding equipment, tires, vehicle's junction box, exhaust pipe and other parts. Through these detailed inspection items and processes, it can be ensured that each component at the bottom of the urban rail vehicle is in good working condition, ensuring the safe operation of the vehicle;

[0004] When inspecting the bottom of a rail vehicle, it is necessary to drive the vehicle to the designated vehicle inspection track. Figure 8 , the attached drawings of the specification Figure 8 It is a top view of the vehicle maintenance track. The support column a supports the maintenance track d. The urban rail vehicle travels on the two maintenance tracks d. There is a sidewalk c between the support column a and the wall b. The maintenance personnel walk on the sidewalk c, then pass between the two support columns a and walk under the urban rail vehicle. The bottom of the urban rail vehicle is illuminated with a searchlight for maintenance.

[0005] In order to reduce the labor intensity of maintenance personnel and save maintenance time, maintenance personnel generally drive a maintenance vehicle for auxiliary maintenance. The maintenance vehicle is mainly composed of a vehicle body, an axle, wheels, a circuit system, a control system, a brake system and other structures. The maintenance vehicle is a mature existing technology and will not be described in detail here.

[0006] When inspecting and repairing urban rail vehicles, if the bearing box, wheel and other parts are damaged and need to be replaced or repaired, a jack or lifting device is needed. The jack or lifting device is also a kind of auxiliary equipment for urban rail vehicle inspection and repair. The jack or lifting device is pushed under the urban rail vehicle, and the output end of the jack or lifting device lifts the bearing and other parts, and then the damaged parts are replaced;

[0007] The existing underbody inspection devices for urban rail vehicles have some defects, such as:

[0008] First, the maintenance personnel need to observe the bottom of the vehicle while holding a lighting lamp. In order to record the bottom of the vehicle, they also need to take pictures of the bottom of the vehicle. The maintenance personnel have many work items, which leads to high labor intensity. Secondly, due to the limitation of the width of the sidewalk c and the distance between two adjacent support columns a, it is difficult to move the jack or lifting equipment from the sidewalk c to the bottom of the urban rail vehicle.

[0009] Therefore, the present invention provides an underbody inspection and maintenance device for urban rail transit vehicles to solve the above problems. Summary of the invention

[0010] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a bottom inspection and maintenance device for urban rail transit vehicles to solve the above-mentioned problems that the labor intensity of maintenance personnel is high and the lifting equipment is difficult to transport to the bottom of the urban rail transit vehicle.

[0011] In order to achieve the above object, the technical solution adopted by the present invention is:

[0012] An underbody inspection and maintenance device for urban rail transit vehicles, comprising an inspection vehicle, an electric jack and a support frame;

[0013] Inspection vehicle: The upper and lower ends of the inspection vehicle are respectively fixed with a limit column and a positioning column, the limit column and the positioning column are located on the same vertical line, a power transmission component is installed in the inspection vehicle, and the input end of the power transmission component is connected to the axle of the inspection vehicle;

[0014] Electric jack: A bottom groove is provided on the lower side of the electric jack, and the positioning column is located in the bottom groove;

[0015] Support frame: grooves are arranged in two opposite sides of the support frame, and the limit column is located between the two grooves. The support frame is located directly above the electric jack, and a searchlight assembly is installed in the support frame. The support frame and the corners of the electric jack are fixed by a positioning connection assembly, and the power transmission assembly pushes the positioning connection assembly to move along the length direction of the maintenance vehicle;

[0016] By means of the above technical scheme, the maintenance vehicle carries the electric jack and the support frame and moves in the sidewalk at the maintenance site of the urban rail vehicle. There is no need for manual transportation of the electric jack and the searchlight assembly, which is easy to use. When the bottom of the urban rail vehicle is searchlight inspected and repaired, the power transmission assembly can push the positioning connection assembly to move, and the positioning connection assembly pushes the electric jack and the support frame to move. The positioning column limits the moving direction of the electric jack, and the limit column limits the moving direction of the support frame, so that the electric jack and the support frame rotate while moving, and then the electric jack and the support frame are inserted under the urban rail vehicle. The searchlight assembly in the support frame can illuminate the bottom of the urban rail vehicle, and the maintenance personnel do not need to carry lighting lamps, thereby reducing the labor intensity of the maintenance personnel. The electric jack can achieve the purpose of lifting, and can be retracted into the maintenance vehicle to achieve the purpose of automatic retraction and release, which is easy to use. The power of the power transmission assembly comes from the maintenance vehicle, so that the maintenance vehicle can inspect the bottom of the urban rail vehicle during normal driving, which is easy to use.

[0017] Preferably, the power transmission assembly includes a transmission wheel, a transmission belt, a push plate, a first cylindrical gear, a second cylindrical gear, a first bevel gear and a second bevel gear. The transmission wheel linear array rotates at the middle end of the maintenance vehicle. A transmission belt is sleeved between the transmission wheels at both ends of the maintenance vehicle and connected through the transmission belt. A push plate is fixed on the side of the transmission belt, and the push plate is located between the electric jack and the support frame.

[0018] The rotation center of the transmission wheel at the end of the maintenance vehicle is fixed to the rotation center of the second bevel gear, the second bevel gear is meshed with the first bevel gear, the first bevel gear and the second cylindrical gear rotate coaxially in the maintenance vehicle, the second cylindrical gear is meshed with the first cylindrical gear, and the first cylindrical gear is fixedly sleeved outside the axle of the maintenance vehicle;

[0019] Through the above technical scheme, the first cylindrical gear is the input end of the power transmission component. When the axle of the maintenance vehicle rotates, it drives the first cylindrical gear to rotate, the first cylindrical gear drives the second cylindrical gear to rotate, the second cylindrical gear drives the first bevel gear to rotate, the first bevel gear drives the second bevel gear to rotate, the second bevel gear drives the transmission wheel to rotate, the transmission wheel drives the transmission belt to move, the transmission belt drives the push plate to move, the push plate pushes the positioning connection component to move, the power transmission component can convert the driving power of the maintenance vehicle to drive the positioning connection component to move, no additional power source is required, the control is simpler, and the cost is lower.

[0020] Preferably, the push plate is arranged obliquely relative to the transmission belt;

[0021] Through the above technical solution, the push plate forms a certain slope, and when the push plate drives the positioning connection assembly to move left and right, a thrust force in the front and rear directions is generated. The positioning connection assembly can move forward and backward more smoothly on the push plate to adjust the front and rear position of the positioning connection assembly, and then adjust the front and rear position of the corner of the electric jack and the support frame, and then adjust the movement and rotation of the electric jack and the support frame.

[0022] Preferably, the positioning connection assembly includes a support seat, a second screw, a positioning hole, a first magnetic position sensor and a second magnetic position sensor, the support seat has two and is respectively fixed at two ends of the electric jack, a positioning hole is provided in the rear end of one support seat and the front end of the other support seat, a second magnetic position sensor is fixed between the lower end of the positioning hole and the upper side of the middle end of the maintenance vehicle, the second screw has two and is threaded through two opposite corners of the support frame, the second screw is located directly above the positioning hole, the lower end diameter of the second screw is smaller than the diameter of the positioning hole, the first magnetic position sensor is fixed between the lower end of the second screw and the upper end of the positioning hole, and the second screw is located within the moving stroke of the push plate;

[0023] Through the above technical solution, when the second screw rod is completely moved upward, the push plate cannot push the second screw rod, so that the support frame and the electric jack cannot move; when the second screw rod moves downward for a certain distance and is not inserted into the positioning hole, the push plate can push the second screw rod, and the second screw rod only drives the support frame to move, so as to only realize the purpose of spotlighting the bottom of the urban rail vehicle; when the second screw rod is completely moved downward and inserted into the positioning hole, the push plate can push the second screw rod, and the second screw rod drives the support frame and the electric jack to move, so as to realize the purpose of spotlighting the bottom of the urban rail vehicle and lifting and repairing; and the first magnetic position sensor and the second magnetic position sensor can respectively identify the positions of the support frame and the electric jack, so as to locate the support frame and the electric jack;

[0024] In summary, the positioning connection component can not only select to make the searchlight component and the electric jack both inoperative, to make only the searchlight component operative, or to make both the searchlight component and the electric jack operative, but also can perform positioning sensing on the support frame and the electric jack.

[0025] Preferably, a first screw is threadedly passed through the front and rear ends of the support seat;

[0026] Through the above technical solution, the first screw can assist the maintenance vehicle in supporting the electric jack after moving downward.

[0027] Preferably, the searchlight assembly includes a horizontal push frame, a camera, a lighting lamp and an inner rotating shaft. The horizontal push frame moves forward and backward through the support frame. The front and rear ends of the horizontal push frame are both rotated and passed through the inner rotating shaft. The front and rear ends of the horizontal push frame are both rotated with cameras and lighting lamps in a linear array. The cameras and lighting lamps are alternately arranged, and the inner rotating shaft is fixedly passed through the cameras and lighting lamps.

[0028] Through the above technical solution, when the push frame is moved laterally, the search position of the camera and the lighting lamp on the bottom of the urban rail vehicle can be adjusted, and when the inner rotating shaft is rotated, the search direction of the camera and the lighting lamp on the bottom of the urban rail vehicle can be adjusted. Then, when the push frame is moved laterally and the inner rotating shaft is rotated, the search position and direction of the camera and the lighting lamp on the bottom of the urban rail vehicle can be adjusted. In this way, the bottom of the urban rail vehicle can be searched in all directions, the blind spot of the field of vision is reduced, and the search range is more comprehensive.

[0029] Preferably, the two diagonal portions of the support frame are provided with raised portions, and anti-collision wheels are rotated in the raised portions through a rotating shaft;

[0030] Through the above technical solution, the support frame will move by rubbing against the front side of the maintenance vehicle when moving and rotating, and the provision of anti-collision wheels can reduce the friction between the support frame and the maintenance vehicle.

[0031] Preferably, a spring is fixed at the end of the maintenance vehicle, and an arc-shaped plate is fixed at the other end of the spring, the central angle of the arc-shaped plate is greater than 90°, the front end of the arc-shaped plate extends along the tangent direction and is set as an inclined surface, and the anti-collision wheel abuts against the surface of the arc-shaped plate;

[0032] Through the above technical solution, when the push plate pushes the positioning connection assembly to move to the far left end, the anti-collision wheel rolls on the arc plate and squeezes the spring, so that the anti-collision wheel is forced to move from the front of the arc plate to the back of the arc plate, and when the push plate leaves the positioning connection assembly, the spring pushes the arc plate, and the arc plate pushes the anti-collision wheel to make the electric jack and the support frame move a certain angle again, that is, the electric jack and the support frame are tilted relative to the maintenance vehicle to neutralize the tilt of the push plate, so as to ensure that the next push plate can drive the positioning connection assembly to move left and right without causing the positioning connection assembly to disengage forward.

[0033] The beneficial effects of the present invention are:

[0034] 1. The maintenance vehicle carries the electric jack and the support frame and moves on the sidewalk of the urban rail vehicle maintenance area. There is no need to manually carry the electric jack and the searchlight assembly. In addition, the electric jack and the searchlight assembly are placed inside the maintenance vehicle along the driving direction of the maintenance vehicle, which is not limited by the width of the sidewalk and is easy to use.

[0035] 2. When performing searchlight inspection and maintenance on the bottom of the urban rail vehicle, the power transmission component can push the positioning connection component to move, and the positioning connection component can push the electric jack and the support frame to move, and the positioning column limits the moving direction of the electric jack, and the limit column limits the moving direction of the support frame, so that the electric jack and the support frame rotate while moving, and then the electric jack and the support frame are inserted under the urban rail vehicle. The electric jack and the support frame move in a lateral movement and rotation mode, and can be smoothly moved from between the two support columns of the maintenance track to the bottom of the urban rail vehicle, and can be smoothly recovered from the bottom of the urban rail vehicle to the maintenance vehicle, making the use and recovery of the electric jack and the support frame very convenient;

[0036] 3. The searchlight assembly in the support frame can illuminate the bottom of the urban rail vehicle, so the maintenance personnel do not need to carry a lighting lamp, which reduces the labor intensity of the maintenance personnel, and the electric jack can achieve the purpose of lifting;

[0037] 4. The power of the power transmission component comes from the maintenance vehicle, that is, the moving power of the electric jack and the support frame comes from the maintenance vehicle, so that the position of the electric jack and the support frame can be adjusted during normal driving of the maintenance vehicle, that is, the electric jack and the support frame can be debugged and inserted under the urban rail vehicle or retracted from the bottom of the urban rail vehicle into the maintenance vehicle, that is, the bottom of the urban rail vehicle can be automatically inspected, which is convenient to use.

[0038] In summary, the device can adjust the positions of the electric jack and the support frame during the driving of the maintenance vehicle, so that the electric jack and the support frame can be inserted under the urban rail vehicle or retracted from the bottom of the urban rail vehicle into the maintenance vehicle. There is no need to carry the electric jack additionally, and it is easy to use. When the support frame moves to the bottom of the urban rail vehicle, the searchlight component can searchlight the bottom of the urban rail vehicle, and the maintenance personnel do not need to carry additional lighting lamps, which is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a stereogram of the present invention.

[0040] Figure 2 for Figure 1 A partial enlarged view of part A.

[0041] Figure 3 A top view of the invention.

[0042] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure at BB.

[0043] Figure 5 for Figure 3 Schematic diagram of the cross-sectional structure at CC.

[0044] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure at DD.

[0045] Figure 7 for Figure 6 A partial enlarged view of part E.

[0046] Figure 8 This is a diagram showing the state change process of the support frame compared to the movement of the urban rail vehicle maintenance track.

[0047] Fig. 9 for Figure 8 Comparison chart of the status changes of the middle support frame.

[0048] Fig.10 Schematic diagram of the change of searchlight range when the searchlight component moves

[0049] In the figure: 1. bottom groove; 2. support seat; 3. first screw rod; 4. electric jack; 5. maintenance vehicle; 6. limit column; 7. support frame; 8. searchlight assembly; 81. horizontal push frame; 82. camera; 83. lighting lamp; 84. inner shaft; 9. anti-collision wheel; 10. second screw rod; 11. transmission wheel; 12. transmission belt; 13. push plate; 14. positioning hole; 15. arc plate; 16. spring; 17. positioning column; 18. first magnetic position sensor; 19. second magnetic position sensor; 20. first cylindrical gear; 21. second cylindrical gear; 22. first bevel gear; 23. second bevel gear. DETAILED DESCRIPTION

[0050] The following will refer to the attached Figures 1 to 10 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0051] As attached Figure 1 -Attached Fig.10 As shown, a bottom inspection and maintenance device for urban rail transit vehicles includes an inspection vehicle 5, an electric jack 4 and a support frame 7;

[0052] Inspection vehicle 5: The inspection vehicle 5 has a rotating axle, which drives the wheels to roll, and then drives the inspection vehicle. The inspection vehicle 5 is equipped with a power transmission component. For details, please refer to the attached Figure 4 The input end of the power transmission assembly is connected to the axle of the maintenance vehicle 5, that is, the axle of the maintenance vehicle 5 provides power for the input end of the power transmission assembly. The upper and lower ends of the maintenance vehicle 5 are respectively fixed with the limit column 6 and the positioning column 17. For details, see the attached Figure 5 , the centers of the limit column 6 and the positioning column 17 are on the same vertical line;

[0053] Electric jack 4: A bottom groove 1 is provided at the lower side of the electric jack 4, and a positioning column 17 is located in the bottom groove 1. When the electric jack 4 moves, the positioning column 17 slides in the bottom groove 1. In addition, the electric jack 4 can be replaced by a lift, and the electric jack 4 is electrically connected to the control center of the maintenance vehicle 5;

[0054] Support frame 7: The interior of the support frame 7 is hollow, so that the support frame 7 is a square ring, so that the output end of the electric jack 4 can be lifted upward through the support frame 7, and the two diagonals of the support frame 7 are provided with protrusions, and anti-collision wheels 9 are rotated in the protrusions through the rotating shaft, and grooves are provided in the two opposite sides of the support frame 7. The limit column 6 is located between the two grooves, so that the support frame 7 is suspended on the limit column 6, and the support frame 7 is located directly above the electric jack 4. A searchlight assembly 8 is installed in the support frame 7, and the corners of the support frame 7 and the electric jack 4 are fixed by a positioning connection assembly, so that the support frame 7 and the electric jack 4 move synchronously, and the power transmission assembly drives the positioning connection assembly to move along the length direction of the maintenance vehicle 5.

[0055] In this embodiment, in conjunction with the attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 4 The power transmission assembly includes a transmission wheel 11, a transmission belt 12, a push plate 13, a first cylindrical gear 20, a second cylindrical gear 21, a first bevel gear 22 and a second bevel gear 23. The transmission wheel 11 rotates in a linear array at the middle end of the maintenance vehicle 5. A transmission belt 12 is sleeved between the transmission wheels 11 at both ends of the maintenance vehicle 5 and is connected through the transmission belt 12. Two push plates 13 are fixed on the side of the transmission belt 12. Figure 1 , Attachment Figure 2 and attached Figure 3 In the embodiment, the push plate 13 is tilted relative to the transmission belt 12, and the front end of the right push plate 13 is tilted to the right. The push plate 13 is located between the electric jack 4 and the support frame 7. When the right push plate 13 moves to the left, it pushes the positioning connection assembly. The rear end of the left push plate 13 is tilted to the left. The length of the push plate 13 is greater than the width of the electric jack 4 and the support frame 7, that is, the front end of the push plate 13 extends out of the maintenance vehicle 5 or is flush with the front side of the maintenance vehicle 5, so as to ensure that the push plate 13 can push the right end rear corner of the electric jack 4 and the support frame 7 to move to the far left;

[0056] The rotation center of the transmission wheel 11 at the end of the maintenance vehicle 5 is fixed to the rotation center of the second bevel gear 23, the second bevel gear 23 is meshed with the first bevel gear 22, the first bevel gear 22 and the second cylindrical gear 21 rotate coaxially in the maintenance vehicle 5, the second cylindrical gear 21 is meshed with the first cylindrical gear 20, and the first cylindrical gear 20 is fixedly sleeved outside the axle of the maintenance vehicle 5;

[0057] The working mode of the power transmission component is as follows: the first cylindrical gear 20 is the input end of the power transmission component. When the axle of the maintenance vehicle 5 rotates, it drives the first cylindrical gear 20 to rotate, the first cylindrical gear 20 drives the second cylindrical gear 21 to rotate, the second cylindrical gear 21 drives the first bevel gear 22 to rotate, the first bevel gear 22 drives the second bevel gear 23 to rotate, the second bevel gear 23 drives the transmission wheel 11 to rotate, the transmission wheel 11 drives the transmission belt 12 to move, the transmission belt 12 drives the push plate 13 to move, and the push plate 13 pushes the positioning connection component to move.

[0058] In this embodiment, see the attached Figure 1 , Attachment Figure 2 and attached Figure 4 The positioning connection assembly includes a support seat 2, a second screw rod 10, a positioning hole 14, a first magnetic position sensor 18 and a second magnetic position sensor 19. The first magnetic position sensor 18 and the second magnetic position sensor 19 are both electrically connected to the control center of the maintenance vehicle 5. The first magnetic position sensor 18 and the second magnetic position sensor 19 are both magnetic position sensors. The magnetic position sensor includes a magnet and a sensor. When the sensor detects the position of the magnet, a detection signal can be generated. The magnetic position sensor is a mature existing technology and will not be described in detail here.

[0059] There are two support seats 2, which are fixed at both ends of the electric jack 4 respectively, and the lower side of the support seat 2 is provided with a bottom groove 1 which is common to the lower side of the electric jack 4. The rear end of one support seat 2 and the front end of the other support seat 2 are both provided with positioning holes 14. A second magnetic position sensor 19 is fixed between the lower end of the positioning hole 14 and the upper side of the middle end of the maintenance vehicle 5, that is, the magnet is fixed on the upper side of the middle end of the maintenance vehicle 5, and the sensor is fixed in the lower end of the positioning hole 14. When the electric jack 4 returns to its original position, the second magnetic position sensor 19 generates a signal and transmits it to the maintenance vehicle;

[0060] The second screw rod 10 has two threads that respectively pass through the two diagonal corners of the support frame 7. The second screw rod 10 is located directly above the positioning hole 14. The lower end diameter of the second screw rod 10 is smaller than the diameter of the positioning hole 14. When the second screw rod 10 rotates, it can be inserted into the positioning hole 14 or pass through the positioning hole 14. The support frame 7 and the electric jack 4 are relatively fixed by inserting the second screw rod 10 into the positioning hole 14. A first magnetic position sensor 18 is fixed between the lower end of the second screw rod 10 and the upper end of the positioning hole 14, that is, the magnet is fixed in the upper end of the positioning hole 14 and the sensor is fixed in the lower end of the second screw rod 10. When the support frame 7 returns to its original position, the first magnetic position sensor 18 generates a signal and transmits it to the maintenance vehicle. The second screw rod 10 is within the moving stroke of the push plate 13.

[0061] In this embodiment, see the attached Figure 1 and attached Figure 4In order to assist the maintenance vehicle 5 in supporting the electric jack 4 , the first screw rod 3 is threadedly passed through the front and rear ends of the support seat 2 .

[0062] In this embodiment, see the attached Figure 1 , Attachment Figure 6 and attached Figure 7 The searchlight assembly 8 includes a horizontal push frame 81, a camera 82, a lighting lamp 83 and an inner rotating shaft 84. The horizontal push frame 81 moves forward and backward through the support frame 7, that is, the moving direction of the horizontal push frame 81 and the moving direction of the support frame 7 are perpendicular to each other. The front and rear ends of the horizontal push frame 81 are both rotated and passed through the inner rotating shaft 84. The front and rear ends of the horizontal push frame 81 are both linearly arrayed with cameras 82 and lighting lamps 83. The cameras 82 and lighting lamps 83 are electrically connected to the control center of the maintenance vehicle 5. The cameras 82 and lighting lamps 83 are alternately arranged, and the inner rotating shaft 84 is fixedly passed through the cameras 82 and lighting lamps 83.

[0063] In referring to the attached Figure 1 , Attachment Figure 6 and attached Figure 7 On the premise of Fig.10 When the lateral push frame 81 is moved laterally, the illumination position of the camera 82 and the lighting lamp 83 on the bottom parts e of the urban rail vehicle can be adjusted. When the inner rotating shaft 84 is rotated, the illumination direction of the camera 82 and the lighting lamp 83 on the bottom parts e of the urban rail vehicle can be adjusted. Then, when the lateral push frame 81 is moved laterally and the inner rotating shaft 84 is rotated, the illumination position and direction of the camera 82 and the lighting lamp 83 on the bottom parts e of the urban rail vehicle can be adjusted. In this way, the bottom parts e of the urban rail vehicle can be illuminated in all directions, the blind spots of the field of vision are reduced, and the illumination range is more comprehensive.

[0064] In this embodiment, see the attached Figure 1 , Attachment Figure 2 and attached Figure 3 A spring 16 is fixed to the end of the maintenance vehicle 5, and an arc plate 15 is fixed to the other end of the spring 16. The central angle of the arc plate 15 is greater than 90°. The front end of the arc plate 15 extends along the tangential direction and is set as an inclined surface. The anti-collision wheel 9 abuts against the surface of the arc plate 15.

[0065] From the attached Figure 1 It can be seen that the front side of the inspection vehicle 5 is not flush with the front side of the electric jack 4, and the electric jack 4 is tilted relative to the inspection vehicle 5, that is, the electric jack 4 and the support frame 7 are both tilted relative to the inspection vehicle 5;

[0066] As described above, the push plate 13 is inclined, and the purpose of setting the spring 16 to push the arc plate 15 is that when the push plate 13 pushes the positioning connection assembly to move to the leftmost end, the anti-collision wheel 9 rolls on the arc plate 15 and squeezes the spring 16, so that the anti-collision wheel 9 is forcibly moved from the front of the arc plate 15 to the rear of the arc plate 15. When the push plate 13 leaves the positioning connection assembly, the spring 16 pushes the arc plate 15, and the arc plate 15 pushes the anti-collision wheel 9, so that the electric jack 4 and the support frame 7 move a certain angle again to achieve the attachment. Figure 1 In the state shown, the electric jack 4 and the support frame 7 are both tilted relative to the maintenance vehicle 5 , so a spring 16 is provided to push the arc plate 15 to neutralize the tilt of the push plate 13 .

[0067] The working principle of this device is:

[0068] When there is no need to inspect a certain section of the bottom of the urban rail vehicle, the second screw rod 10 is completely moved upward, so that the push plate 13 does not push the second screw rod 10 when moving to the left, so that the push plate 13 moves in vain;

[0069] When only the bottom of the urban rail vehicle needs to be searchlit and photographed, the second screw 10 is rotated to move the second screw 10 downward for a distance, but the second screw 10 is not inserted into the positioning hole 14. At this time, the push plate 13 pushes the second screw 10 when moving to the left, and the second screw 10 drives the support frame 7 and the searchlight assembly 8 to move;

[0070] When it is necessary to searchlight the bottom of the urban rail vehicle and inspect the parts at the bottom of the urban rail vehicle, the second screw 10 is rotated to move the second screw 10 down again for a distance, and the second screw 10 is inserted into the positioning hole 14. At this time, the push plate 13 pushes the second screw 10 when moving to the left, and the second screw 10 drives the support frame 7, the searchlight assembly 8 and the electric jack 4 to move;

[0071] From the above, it can be known that when the electric jack 4 moves, the searchlight assembly 8 must move in coordination to provide lighting for the work of the electric jack 4, but the work of the searchlight assembly 8 and the support frame 7 does not necessarily require the electric jack 4 to be carried;

[0072] Taking the positioning connection assembly driving the support frame 7 to move as an example, in conjunction with the attached Figure 8 and attached Fig. 9, the push plate 13 pushes the second screw 10 to move from left to right. Since the second screw 10 is located at the corner of the support frame 7 and the limit column 6 moves at the center of the support frame 7, the support frame 7 is rotated while moving to the right, so that the support frame 7 can be inserted between the two support columns a and then inserted under the urban rail vehicle. At this time, the distance between the second screw 10 and the limit column 6 is the shortest. Then, as the push plate 13 continues to push the second screw 10, the second screw 10 is away from the limit column 6 to pull the support frame 7 out from under the urban rail vehicle until the push plate 13 is disengaged from the second screw 10;

[0073] The electric jack 4 and the support frame 7 move in the same manner.

[0074] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0075] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0076] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An underbody inspection and maintenance device for urban rail transit vehicles, characterized in that: It comprises a maintenance vehicle (5), an electric jack (4) and a support frame (7); Maintenance vehicle (5): a limit column (6) and a positioning column (17) are respectively fixed at the upper and lower ends of the maintenance vehicle (5), the limit column (6) and the positioning column (17) are located on the same vertical line, and a power transmission component is installed in the maintenance vehicle (5), and the input end of the power transmission component is connected to the axle of the maintenance vehicle (5); Electric jack (4): a bottom groove (1) is provided on the lower side of the electric jack (4), and the positioning column (17) is located in the bottom groove (1); Support frame (7): grooves are arranged in two opposite sides of the support frame (7) and a limit column (6) is located between the two grooves. The support frame (7) is located directly above the electric jack (4). A searchlight assembly (8) is installed in the support frame (7). The corners of the support frame (7) and the electric jack (4) are fixed by a positioning connection assembly. The power transmission assembly pushes the positioning connection assembly to move along the length direction of the maintenance vehicle (5).

2. The bottom inspection and maintenance device for urban rail transit vehicles according to claim 1 is characterized in that: The power transmission assembly comprises a transmission wheel (11), a transmission belt (12), a push plate (13), a first cylindrical gear (20), a second cylindrical gear (21), a first bevel gear (22) and a second bevel gear (23); the transmission wheel (11) rotates in a linear array at the middle end of the maintenance vehicle (5); a transmission belt (12) is sleeved between the transmission wheels (11) at both ends of the maintenance vehicle (5) and is connected through the transmission belt (12); a push plate (13) is fixed to the side of the transmission belt (12); and the push plate (13) is located between the electric jack (4) and the support frame (7); The rotation center of the transmission wheel (11) located at the end of the maintenance vehicle (5) is fixed to the rotation center of the second bevel gear (23), the second bevel gear (23) is meshed with the first bevel gear (22), the first bevel gear (22) and the second cylindrical gear (21) rotate coaxially in the maintenance vehicle (5), the second cylindrical gear (21) is meshed with the first cylindrical gear (20), and the first cylindrical gear (20) is fixedly sleeved outside the axle of the maintenance vehicle (5).

3. The bottom inspection and maintenance device for urban rail transit vehicles according to claim 2 is characterized in that: The push plate (13) is arranged obliquely relative to the transmission belt (12).

4. The bottom inspection and maintenance device for urban rail transit vehicles according to claim 2, characterized in that: The positioning connection assembly comprises a support seat (2), a second screw rod (10), a positioning hole (14), a first magnetic position sensor (18) and a second magnetic position sensor (19). The support seat (2) has two and is respectively fixed at two ends of the electric jack (4). The rear end of one support seat (2) and the front end of the other support seat (2) are both provided with positioning holes (14). The second magnetic position sensor (19) is fixed between the lower end of the positioning hole (14) and the upper side of the middle end of the maintenance vehicle (5). The second screw rod (10) has two and is respectively threaded through two opposite corners of the support frame (7). The second screw rod (10) is located directly above the positioning hole (14). The diameter of the lower end of the second screw rod (10) is smaller than the diameter of the positioning hole (14). The first magnetic position sensor (18) is fixed between the lower end of the second screw rod (10) and the upper end of the positioning hole (14). The second screw rod (10) is located within the moving stroke of the push plate (13).

5. The bottom inspection and maintenance device for urban rail transit vehicles according to claim 4, characterized in that: A first screw rod (3) is threadedly passed through the front and rear ends of the support seat (2).

6. The bottom inspection and maintenance device for urban rail transit vehicles according to claim 1, characterized in that: The searchlight assembly (8) comprises a horizontal push frame (81), a camera (82), an illuminating lamp (83) and an inner rotating shaft (84); the horizontal push frame (81) moves forward and backward through the support frame (7); the front and rear ends of the horizontal push frame (81) are both rotated and passed through the inner rotating shaft (84); the front and rear ends of the horizontal push frame (81) are both rotated with the camera (82) and the illuminating lamp (83) in a linear array; the camera (82) and the illuminating lamp (83) are alternately arranged; the inner rotating shaft (84) is fixed and passed through the camera (82) and the illuminating lamp (83).

7. The bottom inspection and maintenance device for urban rail transit vehicles according to claim 1 is characterized in that: The two diagonal corners of the support frame (7) are both provided with raised parts, and anti-collision wheels (9) are rotated in the raised parts via a rotating shaft.

8. The bottom inspection and maintenance device for urban rail transit vehicles according to claim 7, characterized in that: A spring (16) is fixed at the end of the maintenance vehicle (5), and an arc-shaped plate (15) is fixed at the other end of the spring (16). The central angle of the arc-shaped plate (15) is greater than 90°. The front end of the arc-shaped plate (15) extends along the tangential direction and is arranged as an inclined surface. The anti-collision wheel (9) abuts against the surface of the arc-shaped plate (15).

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