Tunnel self-adaptive rubber-tyred plate transport vehicle and working method thereof

Abstract

The invention discloses a tunnel self-adaption tire type plate transporting vehicle and a working method thereof, and relates to the technical field of tunnel construction equipment, the tunnel self-adaption tire type plate transporting vehicle comprises a vehicle frame, cabs are symmetrically arranged at the two ends of the vehicle frame, a plurality of walking assemblies are arranged at the lower end of the vehicle frame, each walking assembly comprises a suspension, and a rotating shaft is fixedly arranged on each suspension; a group of pin seats are fixedly arranged on the rotating shaft, the rotating shaft is fixedly connected with the frame through a rotary supporting bearing, steering oil cylinders are fixedly arranged on the frame, the number of the steering oil cylinders is the same as that of the walking assemblies, and the steering oil cylinders are fixedly connected with the pin seats through pin shafts. A pair of driving wheel assemblies are arranged on the walking assembly, a through groove is formed in the middle of the suspension frame, a two-way air cylinder is fixedly arranged in the through groove, and the two ends of the two-way air cylinder are connected with the driving wheel assemblies. And the loading capacity is single.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction equipment, in particular to a tunnel self-adaptive tire-type pallet truck and a working method thereof. Background Art

[0002] The pallet truck is a specially designed subway vehicle, primarily used to transport subway track-laying precast slabs, flat-plate mixing tanks, square buckets, and other construction materials. It is suitable for reverse operation methods. It can be used in conjunction with tire-type subway track-laying vehicles (self-deforming) and tire-rail interchangeable concrete placing vehicles to effectively simplify the subway tunnel roadbed concrete construction process, improving construction efficiency and quality.

[0003] Traditional pallet trucks often feature integrally welded frames, with no adjustable wheelbase or track width. They have a limited load capacity and are difficult to adapt to materials of varying sizes. Their poor adaptability and complex operation make them unable to meet the efficient and flexible demands of modern subway tunnel construction. Therefore, developing a tire-mounted pallet truck that can adapt to tunnel environments, possesses a high load capacity, and offers flexible operation is crucial for improving construction efficiency and quality. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a tunnel adaptive tire-type pallet transporter and its operating method, which solves the problems of conventional pallet transporters in the prior art, such as the use of an integrally welded frame, the inability to adjust the wheelbase or track, and the limited load capacity.

[0005] To achieve the above-mentioned objectives, the present invention proposes a tunnel adaptive tire-type pallet transporter and a working method thereof, comprising a frame, a cab being symmetrically provided at both ends of the frame, a plurality of traveling assemblies being provided at the lower end of the frame, the traveling assembly comprising a suspension, a rotating shaft being fixedly provided on the suspension, a group of pin seats being fixedly provided on the rotating shaft, the rotating shaft being fixedly connected to the frame through a slewing support bearing, a steering cylinder being fixedly provided on the frame, the number of the steering cylinders being provided being the same as that of the traveling assembly, the steering cylinder being fixedly connected to the pin seats through a pin shaft, a pair of driving wheel assemblies being provided on the traveling assembly, a through slot being provided in the middle of the suspension, a bidirectional cylinder being fixedly provided in the through slot, variable-length telescopic beams being fixedly provided at both ends of the bidirectional cylinder, the variable-length telescopic beam being rotatably connected to the driving wheel assembly.

[0006] As a further solution of the present invention: the frame is composed of parallel I-beams.

[0007] As a further solution of the present invention: the outer ring of the slewing support bearing is fixedly connected to the rotating shaft, and the inner ring of the slewing support bearing is fixedly connected to the vehicle frame.

[0008] As a further solution of the present invention: a steering support is fixedly provided on the vehicle frame, and both ends of the steering cylinder are fixedly connected to the pin seat and the steering support respectively through pin shafts.

[0009] As a further solution of the present invention: the traveling assemblies are provided in four groups, two adjacent traveling assemblies are provided as a pair, and a steering rod is provided between the pin seats of adjacent traveling assemblies.

[0010] As a further solution of the present invention: the variable-length telescopic beam is slidably arranged in the suspension.

[0011] As a further solution of the present invention: a pair of flip supports are fixedly arranged on the variable-length telescopic beam, a flip shaft is rotatably arranged in the flip supports, an adjustment ring is fixedly arranged in the middle of the flip shaft, limited supports are symmetrically arranged on both sides of the suspension, a balance shaft is rotatably arranged in the limit supports, and a suspension inclination cylinder is fixedly connected to the balance shaft.

[0012] As a further solution of the present invention: a limiting nut is provided on the side thread of the balancing shaft, the output shaft of the suspension tilt cylinder is fixedly connected to the adjusting ring, a pair of reinforcing ribs are symmetrically provided on the flip shaft, a steering shaft is fixedly provided on the reinforcing ribs, and the driving wheel assembly is rotatably provided on the steering cylinder.

[0013] As a further solution of the present invention: the method of use in a tunnel with a diameter of 7300mm to 7700mm is as follows:

[0014] S1. Start the vehicle;

[0015] S2. Use a jacking device installed between the ground and the vehicle frame to lift the pallet truck until the tires are 100 mm off the ground. Loosen the limit nuts and activate the two-way cylinders to control the left and right variable-length telescopic beams to extend approximately 600 mm.

[0016] S3. Control the lifting device to lower the tire to the ground and close the vehicle;

[0017] S4. Use a crane to slide the main beam extension section onto the corresponding main beam position;

[0018] S5. Bolt the extension section to the main beam and tighten all bolts before loading.

[0019] S6. Control the lifting device to raise the pallet truck until the tires are 100 mm off the ground;

[0020] S7. Start the vehicle and tighten the limit nut;

[0021] S8. Activate the suspension tilt cylinder to adjust the angle between the tires until the tires are perpendicular to the tunnel entrance ground.

[0022] S9. The lifting device descends so that the tire falls to the ground, ready to enter the tunnel.

[0023] As a further solution of the present invention: Method of use in tunnels with a diameter of 5300mm to 5500mm:

[0024] S1. Start the vehicle;

[0025] S2. Lift the pallet truck by installing a lifting device between the ground and the frame until the tires are 100 mm off the ground;

[0026] S3. Start the suspension tilt cylinder to adjust the angle between the tires until the tires are perpendicular to the ground.

[0027] S4. The lifting device is lowered to allow the tire to fall to the ground, and then loaded and finally prepared to enter the tunnel.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The tire-type pallet truck adopts turntable steering. Each rotating bracket is equipped with a steering cylinder. The front and rear axles are connected by steering rods. The front and rear travel assemblies are linked by cylinders to achieve "eight"-shaped steering. This steering arrangement can achieve small turning angles and small turning radius.

[0030] 2. By setting a suspension tilt cylinder on the suspension and a two-way cylinder inside the suspension, the suspension tilt cylinder is started to push the tilt shaft to rotate, driving the steering shaft to rotate along the tilt shaft, thereby adjusting the angle of the driving wheel assembly. By driving the two-way cylinder to push the variable pitch telescopic beam to extend or retract, the wheelbase between a pair of driving wheel assemblies can be adjusted.

[0031] 3. The wheelbase and track of the tire-type pallet truck are easy to adjust. When adjusting the wheelbase and track, there is no need to make major structural adjustments to the axle. The adjustment can be easily achieved through the cooperation of the jacking device. Transport vehicles of different tonnages can also be obtained by reducing or increasing the number of axles.

[0032] 4. Dual cabs for front and rear driving, flexible driving. The tire-type pallet truck is equipped with a cab at the front and rear. The two cabs are interlocked. When one cab is operational for driving and steering, the other cab's driving and steering functions will be disabled. The two cabs can switch directions. The cab does not need to turn around in the tunnel, which is convenient and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a side view of the present invention;

[0034] Figure 2 A top view of the present invention;

[0035] Figure 3It is a three-dimensional structural diagram of the walking assembly of the present invention;

[0036] Figure 4 It is a partial cross-sectional view of the traveling assembly of the present invention;

[0037] Figure 5 This is a schematic structural diagram of the traveling assembly of the present invention traveling in a circular tunnel;

[0038] Figure 6 For the present invention Figure 4 A magnified view of point A;

[0039] Figure 7 For the present invention Figure 3 Enlarged view of point B.

[0040] In the figure: 1. Frame; 2. Suspension tilt cylinder; 3. Cab; 4. Power system; 5. Travel assembly; 6. Suspension; 7. Operating table; 8. Through slot; 9. Rotating shaft; 10. Slewing support bearing; 11. Steering rod; 12. Pin seat; 14. Steering cylinder; 15. Driving wheel assembly; 16. Driven wheel; 17. Steering support; 18. Bidirectional cylinder; 19. Variable pitch telescopic beam; 20. Flip shaft; 21. Flip support; 22. Adjusting ring; 23. Reinforcing rib plate; 24. Steering shaft; 25. Limit support; 26. Limit nut; 27. Balance shaft; 28. Reserved mounting hole. DETAILED DESCRIPTION

[0041] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] like Figure 1-7 As shown, a tunnel adaptive tire-type plate transport vehicle includes a frame 1. The frame 1 is used as a load-bearing unit, and the material selected is Q345B. The frame structure is composed of parallel I-beams, which has high rigidity and strong bending moment resistance. When subjected to torsion, it has good flexibility and does not deform under impact load. The main beam of the frame 1 is provided with reserved mounting holes 28, which is convenient for lengthening the main beam and increasing the transport load or load. The frame 1 is symmetrically provided with cabs 3 at both ends, which is convenient for operation in tunnels where U-turns are not possible. The operation of the cabs 3 is interlocked, that is, when one cab 3 is working, the other will not work. The lower end of the frame 1 is provided with a walking assembly 5 to drive the movement of the entire device. The middle part of the frame 1 is provided with a power system 4 to provide power drive for the entire device. An operating table 7 is provided in the cab 3 to facilitate the operation of the entire device.

[0043] The walking assembly 5 can be provided with several groups according to needs, and different load capacities can be achieved by configuring different groups of walking assemblies 5; the walking assembly 5 includes a suspension 6, a rotating shaft 9 is fixedly provided on the suspension 6, a group of pin seats 12 are fixedly provided on the rotating shaft 9, the rotating shaft 9 is fixedly connected to the frame 1 through a slewing support bearing 10, the outer ring of the slewing support bearing 10 is fixedly connected to the rotating shaft 9, the inner ring of the slewing support bearing 10 is fixedly connected to the frame 1, a steering cylinder 14 is fixedly provided on the frame 1, and the number of steering cylinders 14 is the same as that of the walking assembly 5. Specifically, a steering support 17 is fixedly provided on the frame 1, and the two ends of the steering cylinder 14 are fixedly connected to the pin seat 12 and the steering support 17 respectively through pins. In this embodiment, the walking assembly 5 is provided with four groups, and two adjacent walking assemblies 5 It is set as a pair, and a steering rod 11 is provided between the pin seats 12 of adjacent walking assemblies 5. The steering rod 11 is fixedly connected to the two pin seats 12 through a pin shaft. A pair of driving wheel assemblies 15 are provided on one walking assembly 5. The driving wheel assembly 15 is a prior art, including a wheel body and a hydraulic motor that drives it to run. The hydraulic motor is electrically connected to the power system 4. A pair of driven wheels 16 are provided on the other adjacent walking assembly 5. The function of the driven wheel 16 is to assist walking and further enhance the stability of the operation of the driving wheel assembly 15. At the same time, in order to reduce the braking cost, the difference between the driven wheel 16 and the driving wheel assembly 15 is that no driving structure is provided. Steering is achieved by the steering cylinder 14. The steering synchronization is further enhanced by the linkage of the steering rod 11.

[0044] As an implementation method in this embodiment, a through slot 8 is opened in the middle of the suspension 6, and a two-way cylinder 18 is fixedly arranged in the through slot 8. A variable-length telescopic beam 19 is fixedly arranged at both ends of the two-way cylinder 18. The variable-length telescopic beam 19 is slidably arranged in the suspension 6. In this embodiment, the two-way cylinder 18 adopts an SMC type cylinder. A pair of flip supports 21 are fixedly arranged on the variable-length telescopic beam 19. A flip shaft 20 is rotatably arranged in the flip support 21, and an adjusting ring 22 is fixedly arranged in the middle of the flip shaft 20. A limited support 25 is symmetrically arranged on both sides of the suspension 6. A balancing shaft 27 is rotatably provided in the support 25, and a suspension tilt cylinder 2 is fixedly connected to the balancing shaft 27. A limiting nut 26 is provided on the side thread of the balancing shaft 27. Tightening the limiting nut 26 realizes the fixed connection between the balancing shaft 27 and the limiting support 25, thereby limiting the suspension tilt cylinder 2; the output shaft of the suspension tilt cylinder 2 is fixedly connected to the adjusting ring 22, and a pair of reinforcing ribs 23 are symmetrically provided on the flip shaft 20, and a steering shaft 24 is fixedly provided on the reinforcing ribs 23. The driving wheel assembly 15 is rotatably provided on the steering cylinder 14, and is Start the suspension tilt cylinder 2, push the tilt shaft 20 to rotate, drive the steering shaft 24 to rotate along the tilt shaft 20, so as to adjust the angle of the driving wheel assembly 15, and drive the two-way cylinder 18 to push the variable pitch telescopic beam 19 to extend or retract, so as to adjust the wheelbase between the pair of driving wheel assemblies 15. In the specific implementation, when adjusting the wheelbase, it is necessary to loosen the limit nut 26, and adjust the variable pitch telescopic beam 19 through the cooperation of the suspension tilt cylinder 2 and the two-way cylinder 18. After the adjustment, tighten the limit nut 26. On the circular track, By activating a pair of suspension tilt cylinders 2, the angle of the driving wheel assembly 15 is adjusted until the driving wheel assembly 15 is perpendicular to the circular track, and the stability of the adjustment is maintained by the suspension tilt cylinders 2. In a specific implementation, when adjusting the angle and wheelbase of the driving wheel assembly 15, in order to ensure the stability of the adjustment, it is necessary to provide a jacking device between the ground and the frame 1, jack up the walking assembly 5 until the driving wheel assembly 15 is off the ground, and then adjust the driving wheel assembly 15. The jacking device is a prior art, and a multi-stage hydraulic cylinder can be selected specifically;

[0045] After the pallet truck is transported to the construction site by car, its condition needs to be adjusted on the ground before it is hoisted into the tunnel.

[0046] Specifically, the method of using this device in a tunnel with a diameter of 7300mm to 7700mm is as follows:

[0047] S1. Start the vehicle;

[0048] S2 by setting a jacking device between the ground and the frame 1 to lift the top of the transport vehicle to the tire 100mm off the ground; loosen the limit nut 26, start the two-way cylinder 18, control the left and right variable pitch telescopic beam 19 extends about 600mm;

[0049] S3. Control the lifting device to lower the tire to the ground and close the vehicle;

[0050] S4. Use a crane to slide the main beam extension section onto the corresponding main beam position;

[0051] S5. Bolt the extension section to the main beam and tighten all bolts before loading.

[0052] S6. Control the lifting device to raise the pallet truck until the tires are 100 mm off the ground;

[0053] S7. Start the vehicle and tighten the limit nut 26;

[0054] S8 starts the suspension tilt cylinder 2 to adjust the angle between the tires until the tires are perpendicular to the ground at the tunnel entrance;

[0055] S9. The lifting device descends so that the tire falls to the ground, ready to enter the tunnel.

[0056] Instructions for use in tunnels with a diameter of 5300mm to 5500mm:

[0057] S1. Start the vehicle;

[0058] S2. By setting a jacking device between the ground and the frame 1 to lift the transport vehicle to the tire 100mm off the ground;

[0059] S3 starts the suspension tilt cylinder 2 to adjust the angle between the tires until the tires are perpendicular to the ground;

[0060] S4. The lifting device is lowered to allow the tire to fall to the ground, and then loaded and finally prepared to enter the tunnel.

[0061] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0062] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A tunnel adaptive tire type pallet truck, characterized in that: The invention comprises a vehicle frame (1), wherein a cab (3) is symmetrically provided at both ends of the vehicle frame (1), and a plurality of travel assemblies (5) are provided at the lower end of the vehicle frame (1), wherein the travel assembly (5) comprises a suspension (6), a rotating shaft (9) is fixedly provided on the suspension (6), a group of pin seats (12) are fixedly provided on the rotating shaft (9), the rotating shaft (9) is fixedly connected to the vehicle frame (1) through a slewing support bearing (10), and a steering oil cylinder (14) is fixedly provided on the vehicle frame (1), and the number of the steering oil cylinders (14) is the same as that of the travel assembly (5). ), the steering oil cylinder (14) is fixedly connected to the pin seat (12) through a pin shaft, a pair of driving wheel assemblies (15) are provided on the walking assembly (5), a through slot (8) is provided in the middle of the suspension (6), a two-way cylinder (18) is fixedly provided in the through slot (8), and variable-length telescopic beams (19) are fixedly provided at both ends of the two-way cylinder (18), the variable-length telescopic beam (19) is rotatably connected to the driving wheel assembly (15), and a suspension inclination oil cylinder (2) for adjusting the inclination angle of the driving wheel assembly (15) is symmetrically provided on the suspension (6).

2. The tunnel adaptive tire-type pallet truck according to claim 1, characterized in that: The vehicle frame (1) adopts parallel I-beams to form a frame structure.

3. The tunnel adaptive tire-type pallet truck according to claim 1, characterized in that: The outer ring of the slewing support bearing (10) is fixedly connected to the rotating shaft (9), and the inner ring of the slewing support bearing (10) is fixedly connected to the vehicle frame (1).

4. The tunnel adaptive tire-type pallet truck according to claim 1, characterized in that: A steering support (17) is fixedly provided on the vehicle frame (1), and both ends of the steering oil cylinder (14) are fixedly connected to the pin seat (12) and the steering support (17) respectively through pin shafts.

5. The tunnel adaptive tire-type pallet truck according to claim 4, characterized in that: The traveling assemblies (5) are provided in four groups, two adjacent traveling assemblies (5) are provided as a pair, and a steering rod (11) is provided between the pin seats (12) of the adjacent traveling assemblies (5).

6. The tunnel adaptive tire-type pallet truck according to claim 1, characterized in that: The variable-length telescopic beam (19) is slidably arranged in the suspension (6).

7. The tunnel adaptive tire-type pallet truck according to claim 1, characterized in that: A pair of tilting supports (21) are fixedly provided on the variable-length telescopic beam (19), a tilting shaft (20) is rotatably provided in the tilting supports (21), an adjusting ring (22) is fixedly provided in the middle of the tilting shaft (20), limited supports (25) are symmetrically provided on both sides of the suspension (6), a balancing shaft (27) is rotatably provided in the limited supports (25), and the suspension tilt cylinder (2) is fixedly provided on the balancing shaft (27).

8. The tunnel adaptive tire-type pallet truck according to claim 7, characterized in that: The side thread of the balancing shaft (27) is provided with a limiting nut (26); the output shaft of the suspension tilt cylinder (2) is fixedly connected to the adjusting ring (22); a pair of reinforcing ribs (23) are symmetrically provided on the tilting shaft (20); a steering shaft (24) is fixedly provided on the reinforcing ribs (23); and the driving wheel assembly (15) is rotatably provided on the steering cylinder (14).

9. A method for operating a tunnel self-adaptive tire-type pallet transporter, according to any one of claims 1 to 8, characterized in that: The method of use in tunnels with a diameter of 7300mm to 7700mm is as follows: S1. Start the vehicle; S2. By setting a jacking device between the ground and the frame (1) to lift the transport vehicle to a height of 100mm above the ground; loosen the limit nut (26), start the two-way cylinder (18), control the left and right variable pitch telescopic beam (19) extending 600mm; S3. Control the lifting device to lower the tire to the ground and close the vehicle; S4. Use a crane to slide the main beam extension section onto the corresponding main beam position; S5. Bolt the extension section to the main beam and tighten all bolts before loading. S6. Control the lifting device to raise the pallet truck until the tires are 100 mm off the ground; S7. Start the vehicle and tighten the limit nut (26); S8. Start the suspension tilt cylinder (2) to adjust the angle between the tires until the tires are perpendicular to the ground at the tunnel entrance; S9. The lifting device descends so that the tire falls to the ground, ready to enter the tunnel.

10. The operating method of a tunnel adaptive tire-type pallet truck according to claim 9, characterized in that: Instructions for use in tunnels with a diameter of 5300mm to 5500mm: S1. Start the vehicle; S2. By setting a jacking device between the ground and the frame (1) to lift the transport vehicle to a height of 100 mm above the ground; S3 starts the suspension tilt cylinder (2) to adjust the angle between the tires until the tires are perpendicular to the ground; S4. The lifting device is lowered to allow the tire to fall to the ground, and then loaded and finally prepared to enter the tunnel.

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