Crane for subway construction

Abstract

The invention discloses a crane for subway construction, and belongs to the technical field of cranes, the crane comprises two lifting frames, the upper parts of the two lifting frames are horizontally and rotatably connected with sliding seats respectively, the two sliding seats are jointly connected with a guide rail in a front-back sliding manner, the guide rail is connected with a monorail crane in a sliding manner, and the two sliding seats are respectively provided with an upper walking mechanism matched with the guide rail; lower walking mechanisms are installed at the bottoms of the two lifting frames respectively. Through mutual cooperation of the lifting frames, the sliding seats, the upper walking mechanisms and the guide rails, the front-back distance between the two lifting frames can be shortened, and therefore the lifting device can adapt to the narrow construction environment and space; by overturning the lower walking mechanism, friction rolling between the track wheels and the subway track or friction rolling between the supporting wheels and the ground can be utilized, and then indirect driving of the speed reduction motor to the track wheels and the supporting wheels is utilized, so that track walking and road walking are achieved; and the hair brushes rotating along with the supporting wheels can clean attached crops on the upper surface of the subway track.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and in particular to a crane for subway construction. Background Art

[0002] During subway construction, since it is often necessary to carry out construction in tunnels, the construction environment is more complex than that in open-air environments, especially the construction space is significantly smaller, which makes it difficult to use many large equipment in tunnels. During subway construction, it is necessary to frequently install workpieces such as tracks and sleepers, so cranes are required. However, existing cranes are difficult to adapt to the narrow construction environment and complex walking environment in tunnels during use: they are large in size and cannot move freely in narrow tunnels; they cannot walk on tracks and on the road at the same time. This brings many inconveniences to lifting and hoisting work, highlighting the shortcomings of existing technologies. Summary of the invention

[0003] The object of the present invention is to provide a crane for subway construction, so as to solve the technical problem that the existing crane is difficult to adapt to the narrow construction environment and the complex walking environment in the tunnel during use.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A subway construction crane comprises two lifting frames, wherein the upper parts of the two lifting frames are respectively connected with sliding seats for horizontal rotation, the two sliding seats are jointly connected with guide rails for forward and backward sliding, the guide rails are slidably connected with a monorail crane, the two sliding seats are respectively equipped with upper walking mechanisms cooperating with the guide rails, and the bottoms of the two lifting frames are respectively equipped with lower walking mechanisms, the lower walking mechanisms comprise a supporting frame, a track wheel, a supporting wheel and a reduction motor, the bottoms of the two lifting frames are respectively connected with the supporting frames for forward and backward rotation, the left and right parts of the supporting frames are respectively connected with the track wheels and the supporting wheels for forward and backward rotation, the upper part of the outer circumference of each track wheel is flush with the upper part of the outer circumference of each supporting wheel, the lower part of the outer circumference of each track wheel is located above the lower part of the outer circumference of each supporting wheel, the left and right parts of the supporting frame are respectively fixed with a reduction motor, the rotating shaft of the reduction motor is meshed and driven with the track wheel through a gear, the track wheel is transmission-connected with the support wheel through a chain drive, the middle part of the support wheel is provided with an annular accommodating groove corresponding to the left and right sides of the track wheel, and an annular brush is fixed in the accommodating groove.

[0005] On the basis of the above technical scheme, the upper walking mechanism includes a lifting wheel, a drag wheel and a No. 1 servo motor. The longitudinal section of the guide rail is an "I" shape. The left and right parts of the sliding seat are each rotatably connected to a horizontal lifting wheel in the left and right directions. The lifting wheels lift and roll on the upper part of the guide rail. The left and right parts of the sliding seat are each rotatably connected to a vertical drag wheel in the up and down directions. The drag wheels on the left and right parts of the sliding seat are clamped and roll with the middle part of the guide rail. A vertical No. 1 servo motor is fixed to the top of the sliding seat. The rotating shaft of the No. 1 servo motor is meshed and transmitted with the drag wheel through gears.

[0006] On the basis of the above technical scheme, the lifting frame and the supporting frame are jointly installed with a flipping mechanism, and the flipping mechanism includes a hydraulic system, a controller, a hydraulic cylinder, a support plate, and a No. 2 servo motor. The two lifting frames are respectively fixed with a hydraulic system, and the two hydraulic systems are respectively fixed with a controller. The hydraulic system and the controller are externally connected to a power supply. The left and right parts of the lifting frame are respectively fixed with two vertical hydraulic cylinders, and the bottom end of the piston rod of each hydraulic cylinder is respectively fixed with a horizontal support plate. The hydraulic cylinder is connected to the hydraulic system through a pipeline, and the two lifting frames are respectively fixed with a vertical No. 2 servo motor. The rotating shafts of the two No. 2 servo motors are respectively meshed with the support frame through bevel gears for transmission. When the No. 2 servo motor is energized and rotated, it can drive the support frame to rotate forward and backward through the bevel gears.

[0007] On the basis of the above technical scheme, brake blocks are respectively connected to the middle part of the two support frames for sliding up and down. The brake blocks corresponding to the same support frame correspond to the support wheels and the track wheels on the left and right. Vertical electric push rods are respectively fixed to the bottom of the two lifting frames. The electric push rods are electrically connected to the controller. Tension springs are respectively fixed at the left and right ends of the brake blocks. The other end of the tension spring is fixed to the support frame. When the push rods of the two electric push rods are extended, they can push the brake blocks downward.

[0008] On the basis of the above technical scheme, a vertical guide cylinder is fixed on each of the left and right parts of the lifting frame, and each of the guide cylinders is slidably connected to a vertical support column up and down, and a horizontal pressure plate is fixed on the bottom end of each of the support columns. The pressure plate, track wheel and support wheel under the same lifting frame are consistent in the left and right directions, and a vertical rack is fixed on the side wall of each of the support columns. A compression spring is fixed on the top of each of the support columns, and the top of each of the compression springs is fixed to the bottom of the lifting frame respectively. A horizontal No. 3 servo motor is fixed on each of the left and right parts of the lifting frame, and an incomplete gear is coaxially fixed to the rotating shaft of each of the No. 3 servo motors, and each of the incomplete gears is intermittently meshed with each rack respectively.

[0009] Compared with the prior art, the present invention has the following advantages: the present invention can shorten the front-to-rear distance between the two lifting frames through the mutual cooperation of the lifting frame, the sliding seat, the upper walking mechanism and the guide rail, so as to adapt to a narrower construction environment and space; by flipping the lower walking mechanism, the rail wheel can be used to frictionally roll with the subway track, or the support wheel can be used to frictionally roll with the ground, and then the rail wheel and the support wheel are indirectly driven by the reduction motor, so as to have both track walking and road walking, and the brush that rotates with the support wheel can clean the attached objects on the upper surface of the subway track to ensure the safety of walking along the track. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the axial side structure of the present invention.

[0011] Figure 2 The present invention is a schematic diagram of the main structure when the lifting frame and the supporting frame cooperate when the vehicle is traveling on a subway track.

[0012] Figure 3 The present invention is a schematic diagram of the axial structure when the lifting frame cooperates with the supporting frame when walking on the ground.

[0013] In the figure: 1. lifting frame, 2. sliding seat, 3. guide rail, 4. monorail crane, 5. upper walking mechanism, 6. lower walking mechanism, 7. supporting frame, 8. track wheel, 9. supporting wheel, 10. reduction motor, 11. receiving groove, 12. brush, 13. lifting wheel, 14. drag wheel, 15. No. 1 servo motor, 16. turning mechanism, 17. hydraulic system, 18. controller, 19. hydraulic cylinder, 20. supporting plate, 21. No. 2 servo motor, 22. brake block, 23. electric push rod, 24. tension spring, 25. guide cylinder, 26. support column, 27. pressure plate, 28. rack, 29. compression spring, 30. No. 3 servo motor, 31. incomplete gear. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1-Figure 3As shown, a crane for subway construction includes two lifting frames 1, the upper parts of the two lifting frames 1 are respectively connected to sliding seats 2 for horizontal rotation, the two sliding seats 2 are connected to guide rails 3 for forward and backward sliding, the guide rails 3 are connected to monorails 4 for sliding, the two sliding seats 2 are respectively installed with upper walking mechanisms 5 that cooperate with the guide rails 3, the bottoms of the two lifting frames 1 are respectively installed with lower walking mechanisms 6, the lower walking mechanisms 6 include support frames 7, track wheels 8, support wheels 9 and reduction motors 10, the bottoms of the two lifting frames 1 are respectively connected to support frames 7 for forward and backward rotation, and the left and right parts of the support frames 7 are connected in front and back. The upper part of the outer circumference of each track wheel 8 is flush with the upper part of the outer circumference of each support wheel 9, and the lower part of the outer circumference of each track wheel 8 is located above the lower part of the outer circumference of each support wheel 9. A reduction motor 10 is fixed to the left and right parts of the support frame 7. The rotating shaft of the reduction motor 10 is meshed with the track wheel 8 through gears. The track wheel 8 is connected to the support wheel 9 through a chain drive. An annular accommodating groove 11 corresponding to the track wheel 8 on the left and right is opened in the middle of the support wheel 9, and an annular brush 12 is fixed in the accommodating groove 11.

[0016] Before use, by pushing the two lifting frames 1 left and right so that they are staggered in the front-to-back direction, the front-to-back distance between the two lifting frames 1 can be reduced, so that it can adapt to tunnels and working environments with smaller widths. The lower walking mechanism 6 has two usage modes. The first mode: there is no need to flip the support frame 7. The track wheel 8 is used to roll and rub against the subway track, and the reduction motor 10 is used to drive the track wheel 8 to rotate, so as to realize walking on the track. During this period, the support wheel 9 and the brush 12 rotating in the opposite direction can clean the attached crops on the surface of the subway track to ensure the safety of walking along the track. The second mode: the local subway construction crane is lifted, and then the support frame 7 is flipped half a circle, and then put back on the ground. At this time, only the support wheel 9 is rolling and rubbing against the ground. At this time, the reduction motor 10 is used to indirectly drive the support wheel 9 to rotate, so that it can walk on the ground without the support of the subway track, which is convenient for hoisting and laying the rails and stock.

[0017] The upper walking mechanism 5 includes a lifting wheel 13, a drag wheel 14 and a servo motor 15. The longitudinal section of the guide rail 3 is an "I" shape. The left and right parts of the sliding seat 2 are each rotatably connected with a horizontal lifting wheel 13 in the left and right directions. The lifting wheel 13 lifts and rolls the upper part of the guide rail 3. The left and right parts of the sliding seat 2 are each rotatably connected with a vertical drag wheel 14 in the up and down directions. The drag wheels 14 of the left and right parts of the sliding seat 2 are clamped and rolled with the middle part of the guide rail 3. A vertical servo motor 15 is fixed to the top of the sliding seat 2. The rotating shaft of the servo motor 15 is meshed with the drag wheel 14 through gears for transmission.

[0018] The No. 1 servo motor 15 can drive the two drag wheels 14 to rotate at the same speed in opposite directions, so that the clamping and rolling friction of the drag wheel 14 on the middle part of the guide rail 3 can be used to realize the movement of the sliding seat 2 along the guide rail 3, so that the relative positions of the sliding seat 2 and the lifting frame 1 compared with the guide rail 3 can be adjusted, which is convenient for moving in a narrow space. The lifting of the guide rail 3 by the lifting wheel 13 can reduce the friction with the sliding seat 2 and reduce wear.

[0019] The lifting frame 1 and the support frame 7 are jointly installed with a flipping mechanism 16, and the flipping mechanism 16 includes a hydraulic system 17, a controller 18, a hydraulic cylinder 19, a support plate 20, and a No. 2 servo motor 21. The two lifting frames 1 are respectively fixed with a hydraulic system 17, and the two hydraulic systems 17 are respectively fixed with a controller 18. The controller 18 is a single-chip microcomputer, a PLC or an industrial computer. The hydraulic system 17 and the controller 18 are externally connected to a power supply. The left and right parts of the lifting frame 1 are respectively fixed with two vertical hydraulic cylinders 19, and the bottom end of the piston rod of each hydraulic cylinder 19 is respectively fixed with a horizontal support plate 20. The hydraulic cylinder 19 is connected to the hydraulic system 17 through a pipeline. The two lifting frames 1 are respectively fixed with a vertical No. 2 servo motor 21. The rotating shafts of the two No. 2 servo motors 21 are respectively meshed with the support frame 7 through bevel gears for transmission. When the No. 2 servo motor 21 is powered on and rotated, it can drive the support frame 7 to rotate forward and backward through the bevel gear.

[0020] Furthermore, in order to facilitate the flipping of the support frame 7, a flipping mechanism 16 is provided. When in use, by controlling the hydraulic system 17 to operate, each hydraulic cylinder 19 extends a piston rod, so that the support plate 20 can be in contact with the ground, and the local subway construction crane can be lifted. At this time, by controlling the second servo motor 21 to rotate, the support frame 7 can be conveniently flipped. At the same time, by using the hydraulic cylinder 19 to lift the local subway construction crane, the monorail crane 4 can lift heavier objects, while also ensuring the stability of the lifting.

[0021] Brake blocks 22 are respectively connected to the middle part of the two support frames 7 for sliding up and down. The brake blocks 22 corresponding to the same support frame 7 correspond to the support wheels 9 and the track wheels 8 on the left and right. Vertical electric push rods 23 are respectively fixed to the bottom of the two lifting frames 1. The electric push rods 23 are electrically connected to the controller 18. Tension springs 24 are respectively fixed at the left and right ends of the brake blocks 22. The other end of the tension spring 24 is fixed to the support frame 7. When the push rods of the two electric push rods 23 are extended, they can push the brake blocks 22 downward.

[0022] Furthermore, in order to stop the traveling state of the local subway construction crane as soon as possible, by controlling the electric push rod 23 to extend the push rod, the brake block 22 can be rubbed against the track or the ground below, thereby increasing the resistance and shortening the braking time. When the electric push rod 23 is retracted, the brake block 22 rises and resets under the elastic pull of the tension spring 24, thereby releasing the contact with the track or the ground below, and then releasing the braking state.

[0023] A vertical guide cylinder 25 is fixed to the left and right parts of the lifting frame 1, and each of the guide cylinders 25 is slidably connected to a vertical support column 26 up and down, and a horizontal pressure plate 27 is fixed to the bottom end of each support column 26. The pressure plate 27, the track wheel 8 and the support wheel 9 under the same lifting frame 1 are consistent in the left and right directions. A vertical rack 28 is fixed to the side wall of each support column 26, and a compression spring 29 is fixed to the top of each support column 26. The top of each compression spring 29 is fixed to the bottom of the lifting frame 1, and a horizontal No. 3 servo motor 30 is fixed to the left and right parts of the lifting frame 1. An incomplete gear 31 is coaxially fixed to the rotating shaft of each No. 3 servo motor 30, and each incomplete gear 31 is intermittently meshed with each rack 28.

[0024] Furthermore, when the ground below is relatively soft and it is necessary to walk on the ground, by controlling the No. 3 servo motor 30 to rotate continuously and accordingly, the meshing of the incomplete gear 31 and the rack 28 can be utilized to realize the intermittent upward movement of the support column 26 along the guide cylinder 25, and in the process of moving upward, the compression spring 29 will be squeezed to store elastic force. When the incomplete gear 31 and the rack 28 are out of meshing, the support column 26 will move downward rapidly under the elastic repulsive force of the compression spring 29, thereby utilizing the pressure plate 27 to compact the road surface below, thereby facilitating the movement of the support wheel 9 and improving the walking stability.

[0025] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A crane for subway construction, comprising two lifting frames (1), wherein the upper parts of the two lifting frames (1) are respectively connected to sliding seats (2) for horizontal rotation, the two sliding seats (2) are connected to a guide rail (3) for forward and backward sliding, and the guide rail (3) is slidably connected to a monorail (4), characterized in that: The two sliding seats (2) are respectively provided with an upper walking mechanism (5) matched with the guide rail (3); the bottoms of the two lifting frames (1) are respectively provided with a lower walking mechanism (6); the lower walking mechanism (6) comprises a support frame (7), a track wheel (8), a support wheel (9) and a reduction motor (10); the bottoms of the two lifting frames (1) are respectively connected to the support frame (7) in a forward and backward rotation manner; the left and right parts of the support frame (7) are respectively connected to the track wheel (8) and the support wheel (9) in a forward and backward rotation manner; the upper part of the outer circumference of each track wheel (8) is connected to each support wheel ( 9) the upper part of the outer circumference is flush, the lower part of the outer circumference of each track wheel (8) is located above the lower part of the outer circumference of each support wheel (9), a reduction motor (10) is fixed to the left and right parts of the support frame (7), the rotating shaft of the reduction motor (10) is meshed with the track wheel (8) through a gear, the track wheel (8) is connected to the support wheel (9) through a chain drive, and the support wheel (9) is provided with an annular receiving groove (11) corresponding to the track wheel (8) on the left and right in the middle part, and an annular brush (12) is fixed in the receiving groove (11).

2. A subway construction crane according to claim 1, characterized in that: The upper walking mechanism (5) comprises a lifting wheel (13), a drag wheel (14) and a first servo motor (15); the guide rail (3) has an I-shaped longitudinal section; the left and right parts of the sliding seat (2) are rotatably connected to horizontal lifting wheels (13) in the left and right directions; the lifting wheels (13) lift and roll the upper part of the guide rail (3); the left and right parts of the sliding seat (2) are rotatably connected to vertical drag wheels (14) in the upper and lower directions; the drag wheels (14) of the left and right parts of the sliding seat (2) are clamped and roll with the middle part of the guide rail (3); a vertical first servo motor (15) is fixed to the top of the sliding seat (2); the rotating shaft of the first servo motor (15) is meshed with the drag wheel (14) through gears for transmission.

3. A subway construction crane according to claim 2, characterized in that: The lifting frame (1) and the supporting frame (7) are jointly equipped with a flipping mechanism (16), and the flipping mechanism (16) includes a hydraulic system (17), a controller (18), a hydraulic cylinder (19), a supporting plate (20), and a second servo motor (21). The two lifting frames (1) are respectively fixed with a hydraulic system (17), and the two hydraulic systems (17) are respectively fixed with a controller (18). The hydraulic system (17) and the controller (18) are externally connected to a power supply. The left and right parts of the lifting frame (1) are each fixed with two A vertical hydraulic cylinder (19), the bottom end of the piston rod of each hydraulic cylinder (19) is respectively fixed with a horizontal support plate (20), the hydraulic cylinder (19) is connected to the hydraulic system (17) through a pipeline, and the two lifting frames (1) are respectively fixed with a vertical No. 2 servo motor (21), and the rotating shafts of the two No. 2 servo motors (21) are respectively meshed with the support frame (7) through bevel gears. When the No. 2 servo motor (21) is powered on and rotated, it can drive the support frame (7) to rotate forward and backward through the bevel gear.

4. A subway construction crane according to claim 3, characterized in that: The middle parts of the two support frames (7) are respectively connected with brake blocks (22) for sliding up and down. The brake blocks (22) corresponding to the same support frame (7) correspond to the support wheels (9) and the track wheels (8) on the left and right. The bottoms of the two lifting frames (1) are respectively fixed with vertical electric push rods (23). The electric push rods (23) are electrically connected to the controller (18). Tension springs (24) are respectively fixed at the left and right ends of the brake blocks (22). The other ends of the tension springs (24) are fixed to the support frame (7). When the push rods of the two electric push rods (23) are extended, they can push the brake blocks (22) downward.

5. A subway construction crane according to any one of claims 1 to 4, characterized in that: A vertical guide cylinder (25) is fixed to the left and right parts of the lifting frame (1), and each of the guide cylinders (25) is slidably connected to a vertical support column (26) up and down. A horizontal pressure plate (27) is fixed to the bottom end of each of the support columns (26). The pressure plate (27), the track wheel (8) and the support wheel (9) under the same lifting frame (1) are consistent in the left and right directions. A vertical rack (28) is fixed to the side wall of each of the support columns (26). A compression spring (29) is fixed to the top of each of the support columns (26). The top of each of the compression springs (29) is fixed to the bottom of the lifting frame (1). A horizontal No. 3 servo motor (30) is fixed to the left and right parts of the lifting frame (1). An incomplete gear (31) is coaxially fixed to the rotating shaft of each of the No. 3 servo motors (30), and each of the incomplete gears (31) is intermittently meshed with each of the racks (28).

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