Cantilever crane device of modularized urban rail steel rail vehicle set and steel rail collecting and unloading method

Abstract

The invention belongs to the technical field of steel rail collecting and unloading, and discloses a modularized urban rail steel rail car set cantilever crane device which comprises a rail, a bottom frame, a lifting hydraulic cylinder mechanism, a cross beam and a vertically telescopic clamp mechanism. The bottom frame comprises a main frame, lifting wheels located at the four corners of the main frame and guide grooves formed in the front side and the rear side of the main frame in an inward mirror symmetry mode; the left end and the right end of the main frame can be fixed to the track through long locking bolts arranged front and back at intervals. The lifting hydraulic cylinder mechanism comprises a mounting base and a lifting hydraulic cylinder; a translation driving assembly is mounted on the cross beam; the vertical telescopic clamp mechanism comprises a telescopic column and a clamp assembly, and the invention further discloses a steel rail collecting and unloading method which comprises the following steps that S1, the steel rail collecting and unloading device is adopted to be laid on a floor of a steel rail train set; s2, moving to a designed position to enable a lifting hydraulic cylinder mechanism to be far away from a steel rail loading and unloading track; s3, the steel rail is clamped, and loading and unloading of the steel rail are completed; the device has the advantages of being high in adaptability, free of occupying ground space for installation and the like.

Description

Technical Field

[0001] This invention belongs to the field of rail handling technology, specifically relating to a modular urban rail rail train cantilever crane device and rail handling method. Background Technology

[0002] The original rail-mounting device of the railcar used a fixed chassis truck crane or T-frame crane. The boom was a rigid structure, but the grippers were connected by steel wire ropes. This steel wire rope structure was a flexible structure, which posed a safety risk during use. It was possible that inertial swinging would occur during use, resulting in collisions and causing damage to operators and equipment. Summary of the Invention

[0003] This invention aims to provide a modular urban rail vehicle cantilever crane device and rail unloading method, which has a high safety factor and secure rail clamping, solving the problem of existing flexible wire rope connecting claws that are prone to inertial swing and pose safety hazards.

[0004] Therefore, the technical solution adopted by this invention is as follows: a modular urban rail transit cantilever crane device, comprising longitudinally laid tracks symmetrically arranged on the left and right, a base frame detachably mounted on the tracks, a lifting hydraulic cylinder mechanism that can be horizontally mounted on the base frame, a crossbeam rotatably mounted on the lifting hydraulic cylinder mechanism, and a vertically telescopic clamping mechanism that can move horizontally along the crossbeam. The base frame includes a main frame, lifting wheels located at the four corners of the main frame, and guide grooves arranged symmetrically inward on the front and rear sides of the main frame. The left and right ends of the main frame can be fixed to the tracks by locking pins spaced apart front and rear. When the lifting wheels descend to the tracks and the locking pins are removed, the base frame can move back and forth along the tracks. The left and right ends of the main frame are centrally located with screw rod mounting seats and are equipped with screw rods. The system includes a horizontal lead screw; the lifting hydraulic cylinder mechanism comprises a mounting base and a lifting hydraulic cylinder. The mounting base has rollers at its front and rear ends that roll along corresponding side guide grooves, and a guide seat mounted on the horizontal lead screw in the middle. Thus, when the horizontal lead screw is turned, the lifting hydraulic cylinder mechanism can be moved horizontally left and right through the guide seat. One end of the crossbeam is mounted on the top of the lifting hydraulic cylinder mechanism via a rotary drive mechanism, and the crossbeam is equipped with a translation drive assembly. The vertically telescopic clamp mechanism includes a telescopic column and a clamp assembly located at the bottom of the telescopic column. The top of the telescopic column is equipped with a movable seat mounted on the crossbeam. The translation drive assembly drives the movable seat to move along the crossbeam via a sprocket and chain drive, thereby driving the vertically telescopic clamp mechanism to translate.

[0005] As a preferred embodiment of the above scheme, the track is made of square steel, and the main frame includes a main beam constructed of horizontal and vertical beams, a center plate located on the main beam, and side plates located on the front and rear sides of the main beam. The guide groove is made of "C"-shaped channel steel with the groove opening facing inward and installed on the inner side of the side plate. The left and right ends of the main beam are respectively provided with two longitudinal beams, which, together with the center plate and the side plates, form a passage for the track to pass through. The passage is provided with through holes on both sides and at intervals on the front and rear of the track for horizontally inserting locking pins, so that the main frame can be fixedly installed on the track by locking the locking pins, and the installation is stable.

[0006] Anti-tipping pins are installed on the outermost longitudinal beams of the main beam near the front and rear ends. An inverted "L"-shaped limiting plate is welded above the anti-tipping pin on the outer side of the track. When the anti-tipping pin rotates outward, it can be stopped by the inverted "L"-shaped limiting plate. Therefore, when it is necessary to adjust the longitudinal position of the main frame locally, the locking pin needs to be removed. At this time, the anti-tipping pin plays the role of anti-tipping protection. The structural design is reasonable and combined with the actual situation.

[0007] Further preferably, the side plate is provided with a notch for the track to pass through, and the front and rear ends of the longitudinal beam at the outermost end of the main beam and the corresponding side plate are provided with upright plates symmetrically located on both sides of the track. The bottom of the upright plate and the track are provided with through holes for inserting locking pins. The upper part of the two upright plates are connected by a strip connecting plate to form a frame structure that accommodates the lifting wheel. The structure is stable and ensures that the front and rear ends of the base frame are fixed with locking pins, effectively preventing tipping.

[0008] More preferably, the lifting wheel includes a manual screw, a roller mounting base, and a traveling wheel. The manual screw is vertically threaded on the side plate and is equipped with a handle at the top and a bearing connection at the bottom to the roller mounting base. The roller mounting base has an overall "n" shaped structure. The traveling wheel is mounted between the vertical side plates of the roller mounting base via a central shaft connected by the bearing. The end of the traveling wheel is provided with a limiting ring to further restrict the travel direction of the traveling wheel and restrict the traveling wheel to move only along the track.

[0009] The end of the central shaft that protrudes from the roller mounting base is provided with an anti-rotation notch. The vertical outer wall of the roller mounting base is equipped with an anti-rotation plate that abuts against the anti-rotation notch, thereby effectively preventing the central shaft from being rotated by the traveling wheel and facilitating assembly.

[0010] Further preferably, the center plate has an installation notch at the position where the cotter pin is placed at the inner end of the corresponding locking long pin. The center plate has symmetrical weight-reducing holes at the front, back, left, and right. A pair of fixed bases are symmetrically arranged at the left, middle, and right positions of the center plate. The mounting base has a mounting through hole corresponding to the pair of fixed bases and is equipped with a washer and screws, so that the mounting base can be installed on the fixed base. The fixed installation of the mounting base with the fixed bases at the left, middle, and right positions can ensure the stopping and fixing of the lifting hydraulic cylinder mechanism at the left, middle, and right positions. The structure is reasonably designed and the three positions can be flexibly selected according to the requirements of loading and unloading rail positions.

[0011] More preferably, the diameter of the insertion end of the locking long pin is thicker on the outside and thinner on the inside, and the corresponding through hole size of the longitudinal beam and track on the outside of the passage is consistent with the diameter of the thick end of the locking long pin, while the diameter of the longitudinal beam on the inside of the passage is matched with the diameter of the thin end of the locking long pin. This effectively prevents the locking long pin from moving and facilitates the uniformity of the installation position of the cotter pin.

[0012] More preferably, the rotary drive mechanism uses a worm gear drive motor, the translation drive component uses a drive motor, the crossbeam is a rectangular box-shaped structure, with sprockets and circumferential chains surrounding the sprockets built into the left and right ends, and one end of the sprocket is connected to the output end of the translation drive component. The movable seat frames the crossbeam and has a frame structure that is wider at the top and narrower at the bottom. The movable seat has traveling rollers that travel along the upper and lower side walls of the crossbeam, with the upper and lower sides facing inward. The side wall of the movable seat has a "U"-shaped notch for the central shaft end of the traveling roller, and is equipped with a "T"-shaped mounting block that inserts into the notch to abut against the central shaft of the traveling roller. This facilitates assembly while ensuring that the distance between the two upper traveling rollers is greater than the distance between the two lower traveling rollers, thus fully ensuring the stability of the overall movement of the movable seat.

[0013] The top of each end of the crossbeam is equipped with wedge-shaped stops to limit the travel of the movable seat. The movable seat is partially fixed to the circumferential chain. When the translation drive assembly drives the sprocket to move the circumferential chain, the movable seat moves synchronously with the circumferential chain. This ensures that the movable seat will not go beyond the crossbeam. The interlocking structural design forms multiple layers of protection for the limiting mechanism.

[0014] More preferably, the clamp assembly includes a clamp seat fixedly connected to the bottom of the telescopic column, a clamp drive motor and a clamping jaws installed sequentially from top to bottom on the clamp seat, the output screw of the clamp drive motor being connected to the bearing of the clamp seat, and a movable block being threaded onto the output screw, the middle part of the clamping jaws being rotatably mounted on the clamp seat via a clamping jaw hinge post, a connecting plate being hinged to the top of the clamping jaws, and the other end of the connecting plate being hinged to the movable block, so that when the clamp drive motor drives the threaded rod to rotate, the movable block moves up and down, driving the clamping jaws to clamp and loosen through the connecting plate. The structure is reasonably designed and the concept is novel.

[0015] A further preferred embodiment is that the lower front and rear sides of the clamp seat are equipped with rail top isolation rollers, and the bottom bearing of the clamp is equipped with rail sidewall isolation rollers, which effectively prevents the rail from directly contacting the clamp assembly, causing collisions and resulting in component wear.

[0016] This plan also employs a rail unloading method, including the following steps:

[0017] Step S1: The above-mentioned modular urban rail rail car cantilever crane device is laid on the floor of the rail car, and a corresponding number of modular urban rail rail car cantilever crane devices are installed according to the length of the rail.

[0018] Step S2: When the vehicle is running, the main frame is fixed on the track and the crossbeam is rotated to not exceed the vehicle limit. After running to the design position, the longitudinal position of the underframe and the lateral position of the lifting hydraulic cylinder mechanism are adjusted according to the rail loading and unloading position, so that the lifting hydraulic cylinder mechanism is away from the rail loading and unloading track.

[0019] Step S3: Move the vertically telescopic clamp mechanism along the crossbeam to the rail clamping position, then telescopically lower the clamp to clamp the rail, then telescopically raise the rail and move it along the crossbeam to the rail placement position, then telescopically lower the rail again. Repeat the operation to complete the loading and unloading of the rail.

[0020] The beneficial effects of this invention are:

[0021] (1) Compared with the flexible connection of steel wire rope clamps, this solution adopts a vertical telescopic clamp mechanism. The clamps achieve the function of lifting up and down through the telescopic cylinder, which greatly improves the overall rigidity and reduces the safety hazards caused by the swaying of the clamps. It can move horizontally through the cooperation of the crossbeam and the base frame, and move vertically through the lifting hydraulic cylinder mechanism and the telescopic cylinder, thus being suitable for loading and unloading rails in various situations and having a wide range of applications.

[0022] (2) The track can be laid symmetrically on the railcar body, so that the modular urban rail railcar cantilever crane device can be flexibly arranged according to the rail position. Furthermore, the appropriate number of devices can be installed according to the length of the rail and the weight, effectively avoiding the overall overturning due to excessive weight of the rail. It is flexible to install, highly adaptable, and has high practical value.

[0023] (3) Compared with existing fixed chassis truck cranes, which require additional space, but due to the narrow terrain of urban rail in some areas, there is no other space to park truck cranes, this application can be flexibly installed on the body of the railcar without occupying ground space.

[0024] In summary, this invention has the advantages of being applicable to loading and unloading rails in various situations, having strong adaptability, and not occupying ground space for installation. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of the present invention.

[0026] Figure 2 for Figure 1 A schematic diagram of the structure with the middle crossbeam rotated 45°.

[0027] Figure 3 This is a structural schematic diagram of the underframe from an upward angle.

[0028] Figure 4 This is a cross-sectional view of the lifting wheel.

[0029] Figure 5 This is a schematic diagram of the lifting hydraulic cylinder mechanism.

[0030] Figure 6 This is a structural schematic diagram of the crossbeam, with some internal parts exposed.

[0031] Figure 7 This is a schematic diagram of the clamp assembly.

[0032] Figure 8 This is a schematic diagram of the gripper structure. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0034] Combination Figure 1 — Figure 8 As shown, a modular urban rail vehicle cantilever crane device consists of longitudinally laid tracks symmetrically arranged on the left and right, a base frame 2 detachably mounted on the tracks 1, a lifting hydraulic cylinder mechanism 3 that can be horizontally mounted on the base frame 2, a crossbeam 4 that can be rotatably mounted on the lifting hydraulic cylinder mechanism 3, and a vertically telescopic clamping mechanism 5 that can move horizontally along the crossbeam 4.

[0035] Square steel is preferred for track 1.

[0036] The base frame 2 consists of a main frame 21, lifting wheels 22 located at the four corners of the main frame 21, and guide grooves 23 arranged symmetrically inward on the front and rear sides of the main frame 21. The left and right ends of the main frame 21 can be fixed to the track 1 by locking pins 24 spaced apart front and rear. When the lifting wheels 22 descend to the track 1 and the locking pins 24 are removed, the base frame 2 can move back and forth along the track 1. The left and right ends of the main frame 21 are provided with screw rod mounting seats 26, and transverse screw rods 25 are installed.

[0037] The main frame 21 consists of a main beam 211 constructed from horizontal and vertical beams, a center plate 212 located on the main beam 211, and side plates 213 located on the front and rear sides of the main beam 211. The guide groove 23 is made of "C"-shaped channel steel with the groove opening facing inward and installed on the inner side of the side plate 213. Two longitudinal beams are respectively provided at the left and right ends of the main beam 211, which, together with the center plate 212 and the side plate 213, form a passage for the rail 1 to pass through. Through holes for horizontal and horizontal insertion of locking long pins 24 are provided on both sides of the passage and at intervals before and after the rail 1, so that the main frame 21 can be fixedly installed on the rail 1 by locking long pins 24. Anti-tipping short pins 211a are installed on the outermost longitudinal beam of the main beam 211 near the front and rear ends. An inverted "L"-shaped limiting plate is welded above the anti-tipping short pins 211a on the outer side of the rail 1, so that when the anti-tipping short pins 211a rotate outward, they can be stopped by the inverted "L"-shaped limiting plate.

[0038] The side plate 213 is provided with a notch for the rail 1 to pass through. The front and rear ends of the longitudinal beam at the outermost end of the main beam 211 and the corresponding side plate 213 are provided with upright plates 214 symmetrically located on both sides of the rail 1. The bottom of the upright plate 214 and the rail 1 are provided with through holes for the insertion of locking pins 24. The upper parts of the two upright plates 214 are connected by strip connecting plates 214a, thereby forming a frame structure that accommodates the lifting wheel 22.

[0039] The lifting wheel 22 consists of a manual screw 221, a roller mounting base 222, and a traveling wheel 223. The manual screw 221 is vertically threaded on the side plate 213 and is equipped with a handle 221a at the top and a bearing connection at the bottom to the roller mounting base 222. The roller mounting base 222 has an overall "n" shaped structure. The traveling wheel 223 is installed between the vertical side plates of the roller mounting base 222 via a central shaft 224 connected by a bearing. The end of the traveling wheel 223 is provided with a limiting retaining ring 223a. The end of the central shaft 224 that protrudes from the roller mounting base 222 is provided with an anti-rotation notch. The vertical outer wall of the roller mounting base 222 is equipped with an anti-rotation plate 222a that abuts against the anti-rotation notch.

[0040] The center plate 212 has an installation notch 212b at the position where the cotter pin is placed at the inner end of the locking long pin 24. The center plate 212 has weight reduction holes 212a symmetrically arranged in front, back, left and right. The center plate 212 has a pair of fixed bases 212c symmetrically arranged in front, back, left and right at the left, middle and right. The mounting base 31 has a mounting through hole corresponding to the pair of fixed bases 212c and is equipped with a washer and screws so that the mounting base 31 can be installed on the fixed bases 212c. The fixed installation of the mounting base 31 with the fixed bases 212c at the left, middle and right can ensure the stopping and fixing of the lifting hydraulic cylinder mechanism 3 in the left, middle and right positions.

[0041] The diameter of the insertion end of the locking long pin 24 is thicker on the outside and thinner on the inside. The corresponding through hole size of the longitudinal beam on the outside of the passage and the track 1 is consistent with the diameter of the thick end of the locking long pin 24, while the diameter of the longitudinal beam on the inside of the passage is matched with the diameter of the thin end of the locking long pin 24.

[0042] The lifting hydraulic cylinder mechanism 3 consists of a mounting base 31 and a lifting hydraulic cylinder 32. The mounting base 31 has rollers 312 that roll along the corresponding side guide grooves 23 at the front and rear ends of the bottom, and a guide seat 311 mounted on the transverse screw 25 in the middle. So when the transverse screw 25 is turned, the lifting hydraulic cylinder mechanism 3 can be driven to move left and right through the guide seat 311.

[0043] One end of the crossbeam 4 is mounted on the top of the lifting hydraulic cylinder mechanism 3 via a rotary drive mechanism 41, and the crossbeam 4 is equipped with a translation drive assembly 42.

[0044] The rotary drive mechanism 41 preferably adopts a worm gear drive motor, the translation drive component 42 adopts a drive motor, the crossbeam 4 is in the form of a cuboid box structure, the left and right ends are equipped with sprockets and circumferential chains 43 surrounding the sprockets, and one end of the sprocket is connected to the output end of the translation drive component 42.

[0045] The vertically telescopic clamp mechanism 5 consists of a telescopic column 51 and a clamp assembly 52 located at the bottom of the telescopic column 51. The top of the telescopic column 51 is provided with a movable seat 53 mounted on the crossbeam 4. The translation drive assembly 42 drives the movable seat 53 to move along the crossbeam 4 through sprocket and chain transmission, thereby driving the vertically telescopic clamp mechanism 5 to translate.

[0046] The movable seat 53 frames the crossbeam 4 and has a frame structure that is wider at the top and narrower at the bottom. The movable seat 53 has a traveling roller 531 that travels along the upper and lower side walls of the crossbeam 4. The side wall of the movable seat 53 has a "U"-shaped notch for the end of the central shaft of the traveling roller 531, and is equipped with a "T"-shaped mounting block 532 that inserts into the notch to abut against the central shaft of the traveling roller 531. The top of both ends of the crossbeam 4 is provided with wedge-shaped blocks 44 that limit the travel of the movable seat 53. The movable seat 53 is partially fixed to the circumferential chain. When the translation drive assembly 42 drives the sprocket to move the circumferential chain 43, the movable seat 53 synchronously follows the circumferential chain 43 to translate.

[0047] The clamp assembly 52 consists of a clamp seat 522 fixedly connected to the bottom of the telescopic column 51, a clamp drive motor 521 and a jaw 523 mounted sequentially from top to bottom on the clamp seat 522. The output screw of the clamp drive motor 521 is connected to the bearing of the clamp seat 522. A movable block 525 is threaded onto the output screw. The middle part of the jaw 523 is rotatably mounted on the clamp seat 522 through a jaw hinge post 523b. A connecting plate 524 is hinged to the top of the jaw 523, and the other end of the connecting plate 524 is hinged to the movable block 525. Thus, when the clamp drive motor 521 drives the threaded rod to rotate, the movable block 525 moves up and down, and through the connecting plate 524, it drives the jaw 523 to clamp and loosen.

[0048] Each gripper 523 is equipped with two connecting plates 524 that are respectively hinged to both sides of the movable block 525, and the connecting plates 524 of the two grippers 523 are arranged alternately.

[0049] The front and rear sides of the lower part of the clamp seat 522 are equipped with rail top isolation rollers 522a, and the bottom bearing of the clamp 523 is equipped with rail sidewall isolation rollers 523a.

[0050] A method for unloading steel rails, the specific implementation steps are as follows:

[0051] Step S1: The above-mentioned modular urban rail car cantilever crane device is laid on the floor of the rail car, and a corresponding number of modular urban rail car cantilever crane devices are installed according to the length of the rail.

[0052] Step S2: When the vehicle is running, the main frame 21 is fixed on the track 1, and the crossbeam 4 is rotated to not exceed the vehicle limit. After running to the design position, the longitudinal position of the base frame 2 and the lateral position of the lifting hydraulic cylinder mechanism 3 are adjusted according to the rail loading and unloading position, so that the lifting hydraulic cylinder mechanism 3 is away from the rail loading and unloading track.

[0053] When the vehicle is in operation, the crossbeam 4 must be rotated to an angle of 0° to 45° with the longitudinal direction of the vehicle body to ensure that it does not exceed the vehicle clearance limits.

[0054] Step S3: After the vertically telescopic clamping mechanism 5 moves along the crossbeam to the rail clamping position, it telescopically lowers and clamps rail A. Then, it telescopically raises rail A and moves along the crossbeam to the rail placement position, then telescopically lowers rail A again. Repeat the operation to complete the loading and unloading of rail A.

Claims

1. A modular urban rail transit railcar cantilever crane device, characterized in that: The system includes a longitudinally laid track (1) symmetrically arranged on the left and right, a base frame (2) detachably mounted on the track (1), a lifting hydraulic cylinder mechanism (3) laterally mounted on the base frame (2), a crossbeam (4) rotatably mounted on the lifting hydraulic cylinder mechanism (3), and a vertically telescopic clamp mechanism (5) that moves horizontally along the crossbeam (4). The base frame (2) includes a main frame (21), lifting wheels (22) located at the four corners of the main frame (21), and guide grooves (23) symmetrically arranged in a mirror image on the front and rear sides of the main frame (21). The left and right ends of the main frame (21) can be fixed to the track (1) by locking long pins (24) spaced apart front and back. When the lifting wheels (22) descend to the track (1) and the locking long pins (24) are removed, the base frame (2) can move back and forth along the track (1). The left and right ends of the main frame (21) are provided with screw mounting seats (26) and are equipped with transverse screws (25). The lifting hydraulic cylinder mechanism (3) includes a mounting base. The mounting base (31) and the lifting hydraulic cylinder (32) are provided with rollers (312) that roll along the corresponding side guide grooves (23) at the front and rear ends of the bottom of the mounting base (31) and a guide seat (311) installed on the horizontal screw (25) in the middle. When the horizontal screw (25) is turned, the lifting hydraulic cylinder mechanism (3) can be driven to move left and right through the guide seat (311). One end of the crossbeam (4) is installed on the top of the lifting hydraulic cylinder mechanism (3) through the rotation drive mechanism (41). The crossbeam (4) is equipped with a translation drive assembly (42). The vertically telescopic clamp mechanism (5) includes a telescopic column (51) and a clamp assembly (52) located at the bottom of the telescopic column (51). The top of the telescopic column (51) is provided with a movable seat (53) installed on the crossbeam (4). The translation drive assembly (42) drives the movable seat (53) to move along the crossbeam (4) through sprocket and chain transmission, thereby driving the vertically telescopic clamp mechanism (5) to move.

2. The modular urban rail transit railcar cantilever crane device according to claim 1, characterized in that: The track (1) is made of square steel. The main frame (21) includes a main beam (211) constructed of horizontal and vertical beams, a center plate (212) on the main beam (211), and side plates (213) on the front and rear sides of the main beam (211). The guide groove (23) is made of "C"-shaped channel steel with the groove opening facing inward and installed inside the side plate (213). The left and right ends of the main beam (211) are respectively provided with two longitudinal beams, which, together with the center plate (212) and the side plate (213), form a passage for the track (1) to pass through. The passage has two sides. The track (1) is provided with through holes at intervals for horizontal insertion of locking pins (24), so that the main frame (21) can be fixedly installed on the track (1) by locking pins (24). Anti-tipping pins (211a) are installed on the outermost longitudinal beam of the main beam (211) near the front and rear ends. An inverted "L" shaped limiting plate is welded above the anti-tipping pins (211a) on the outer side of the track (1), so that when the anti-tipping pins (211a) rotate outward, they can be stopped by the inverted "L" shaped limiting plate.

3. The modular urban rail transit railcar cantilever crane device according to claim 2, characterized in that: The side plate (213) is provided with a notch for the track (1) to pass through. The front and rear ends of the longitudinal beam at the outermost end of the main beam (211) and the corresponding side plate (213) are provided with upright plates (214) symmetrically located on both sides of the track (1). The bottom of the upright plate (214) and the track (1) are provided with through holes for the insertion of locking long pins (24). The upper parts of the two upright plates (214) are connected by strip connecting plates (214a) to form a frame structure that accommodates the lifting wheel (22).

4. The modular urban rail transit railcar cantilever crane device according to claim 2, characterized in that: The lifting wheel (22) includes a manual screw (221), a roller mounting base (222), and a traveling wheel (223). The manual screw (221) is vertically threaded on the side plate (213) and is equipped with a handle (221a) at the top and a bearing connection at the bottom to the roller mounting base (222). The roller mounting base (222) has an overall "n" shaped structure. The traveling wheel (223) is mounted between the vertical side plates of the roller mounting base (222) through a central shaft (224) connected by a bearing. The end of the traveling wheel (223) is provided with a limiting retaining ring (223a). The end of the central shaft (224) that protrudes from the roller mounting base (222) is provided with an anti-rotation notch. The vertical outer side wall of the roller mounting base (222) is correspondingly equipped with an anti-rotation plate (222a) that abuts against the anti-rotation notch.

5. A modular urban rail transit railcar cantilever crane device according to claim 2, characterized in that: The center plate (212) has an installation notch (212b) at the position where the cotter pin is placed at the inner end of the corresponding locking long pin (24). The center plate (212) is symmetrically provided with weight reduction holes (212a) on the front, back, left and right sides. The center plate (212) is symmetrically provided with a pair of fixed bases (212c) on the left, middle and right sides. The mounting base (31) is provided with a mounting through hole corresponding to the pair of fixed bases (212c) and is equipped with a gasket and screws so that the mounting base (31) can be installed on the fixed base (212c). The mounting base (31) can be fixedly installed with the fixed bases (212c) on the left, middle and right sides respectively to ensure the stopping and fixing of the lifting hydraulic cylinder mechanism (3) in the left, middle and right positions.

6. The modular urban rail transit railcar cantilever crane device according to claim 1, characterized in that: The diameter of the insertion end of the locking pin (24) is thicker on the outside and thinner on the inside. The diameter of the through hole corresponding to the longitudinal beam and the track (1) on the outside of the passage is consistent with the diameter of the thick end of the locking pin (24), while the diameter of the longitudinal beam on the inside of the passage is matched with the diameter of the thin end of the locking pin (24).

7. The modular urban rail transit railcar cantilever crane device according to claim 1, characterized in that: The rotary drive mechanism (41) uses a worm gear drive motor, the translation drive assembly (42) uses a drive motor, the crossbeam (4) is a rectangular box structure, with sprockets and circumferential chains (43) built into the left and right ends, and one end of the sprocket is connected to the output end of the translation drive assembly (42). The movable seat (53) frames the crossbeam (4) and has a frame structure that is wider at the top and narrower at the bottom. The movable seat (53) has traveling rollers (531) that travel along the upper and lower side walls of the crossbeam (4) facing inwards. 53) The side wall is provided with a "U" shaped notch at the end of the central shaft of the traveling roller (531) and is equipped with a "T" shaped mounting block (532) that inserts into the notch to abut against the central shaft of the traveling roller (531). The top of both ends of the crossbeam (4) is provided with wedge-shaped blocks (44) that limit the travel of the movable seat (53). The movable seat (53) is partially fixed to the circumferential chain. When the translation drive assembly (42) drives the sprocket to move the circumferential chain (43), the movable seat (53) moves synchronously with the circumferential chain (43).

8. The modular urban rail transit railcar cantilever crane device according to claim 1, characterized in that: The clamp assembly (52) includes a clamp seat (522) fixedly connected to the bottom of the telescopic column (51), a clamp drive motor (521) and a jaw (523) installed sequentially from top to bottom on the clamp seat (522). The output screw of the clamp drive motor (521) is connected to the bearing of the clamp seat (522), and the output screw is threaded with a movable block (525). The middle part of the jaw (523) is rotatably mounted on the clamp seat (522) through the jaw hinge post (523b). The top of the jaw (523) is hinged with a connecting plate (524), and the other end of the connecting plate (524) is hinged to the movable block (525). Thus, when the clamp drive motor (521) drives the threaded rod to rotate, the movable block (525) moves up and down, and the jaw (523) is clamped and released through the connecting plate (524).

9. A modular urban rail transit railcar cantilever crane device according to claim 8, characterized in that: The lower front and rear sides of the clamp seat (522) are equipped with rail top isolation rollers (522a), and the bottom bearing of the clamp (523) is equipped with rail sidewall isolation rollers (523a).

10. A method for unloading and collecting steel rails, characterized in that, Includes the following steps: Step S1: A modular urban rail car cantilever crane device as described in any one of claims 1-9 is laid on the floor of the rail car, and a corresponding number of modular urban rail car cantilever crane devices are installed according to the length of the rail. Step S2: When the vehicle is running, the main frame (21) is fixed on the track (1), and the crossbeam (4) is rotated to not exceed the vehicle limit. After running to the design position, the longitudinal position of the base frame (2) and the lateral position of the lifting hydraulic cylinder mechanism (3) are adjusted according to the rail loading and unloading position, so that the lifting hydraulic cylinder mechanism (3) is far away from the rail loading and unloading track. Step S3: Move the vertically telescopic clamp mechanism (5) along the crossbeam to the rail clamping position, then telescopically lower and clamp the rail (A), then telescopically raise the rail (A) and move it along the crossbeam to the rail placement position, then telescopically lower the rail (A) again. Repeat the operation to complete the loading and unloading of the rail (A).

Images