Heavy-load transportation trolley for transportation in narrow channel

Abstract

The utility model relates to a small-sized transport vehicle, in particular to a heavy-load transport trolley for transporting in a narrow channel, which solves the technical problems that the existing tonnage heavy container is difficult to turn, the personnel can not be carried out, the safety risk is higher and the existing tonnage heavy container is not suitable for the transportation in the irradiation room channel when the existing tonnage heavy container is transported. The heavy-load transportation trolley for transportation in the narrow channel comprises a control module, a supporting plate, driving wheels, a differential mechanism, steering wheels, an electric driving device, an electric control box and a steering driving device. A frequency converter and a relay are arranged in the electric cabinet; the input end of the frequency converter is connected with an external 380V power supply, and the output end is connected with the differential mechanism through the electric driving device; the output end of the differential mechanism is connected with the left driving wheel and the right driving wheel. The input end of the relay is connected with an external 220V power supply, and the output end of the relay is connected with the control end of the steering driving device; the output end of the steering driving device is connected with the left steering wheel and the right steering wheel and used for achieving left-right steering control over the heavy-load transportation trolley.

Description

Technical Field

[0001] The utility model relates to a small transport vehicle, in particular to a heavy-load transport vehicle used for transporting goods through narrow passages. Background Art

[0002] When transporting heavy containers weighing tons using small transport vehicles, forklifts are often used in larger spaces. Their load range can range from tens of kilograms to several tons, making them safe and labor-saving. However, forklifts are limited by their large operating volume and cannot be used in confined spaces of 1.2 to 1.5 meters. In smaller spaces, manual flatbed trucks and trolleys are often used. These manual trucks are more suitable for objects weighing 2 tons or less and are more convenient and economical. However, transporting containers weighing 2 tons or more in a confined space of 1.2 to 1.5 meters presents difficulties with turning, limited maneuverability, and high safety risks. When loading Class I radioactive sources, transport containers containing them must enter the irradiation chamber through a maze. Due to shielding requirements, transport containers weigh 4 to 6 tons and have a diameter of 650 to 910 mm. The maze in the irradiation chamber is only 1.2 to 1.5 meters wide and has multiple right-angle bends, resulting in a small operating space and turning radius. Conventional forklifts, manual flatbed trucks, and trolleys are not suitable. At the same time, according to the limit requirement of "5.3.1 The maximum radiation level at any point on the outer surface of the cargo package or collective packaging should not exceed 2mSv / h" in GB11806-2019 "Regulations on the Safe Transport of Radioactive Materials", the surface dose rate of the transport container is relatively high, and personnel who approach the container for half an hour will be exposed to a dose of less than or equal to 1mSv, which poses a high radiation risk.

[0003] Therefore, there is an urgent need to design a heavy-duty transport cart for narrow channel transportation, with a load capacity of 4 to 6 tons, which can flexibly pass through narrow mazes with right-angle turns and can be controlled from a distance without the need for personnel to operate close to the ground. This ensures that the radiation protection optimization principle (ALARA principle) is followed when transporting transport containers containing Class I radioactive sources, thereby reducing the exposure dose to personnel. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems that the existing heavy containers of tons in weight have difficulty in turning, personnel cannot move freely, safety risks are high, and they are not suitable for transportation in the maze of irradiation chambers. Instead, a heavy-load transport trolley for transportation in narrow channels is provided.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A heavy-load transport trolley for narrow channel transport, which is special in that it includes a control module, a pallet, a drive wheel arranged at the bottom of the pallet, a differential, a steering wheel, an electric drive device, an electric control box, and a steering drive device arranged at the front side of the pallet;

[0007] The driving wheels include a left driving wheel and a right driving wheel arranged on both sides of the rear end of the bottom of the support plate;

[0008] The steering wheels include a left steering wheel and a right steering wheel arranged on both sides of the front end of the bottom of the support plate;

[0009] The electrical control box is equipped with a frequency converter and relays. The frequency converter input is connected to an external 380V power supply, and the output is connected to the differential through an electric drive device. The output of the differential is connected to the left and right drive wheels respectively. The relay input is connected to an external 220V power supply, and the output is connected to the control terminal of the steering drive device. The output of the steering drive device is connected to the left and right steering wheels respectively to achieve left and right steering control of the heavy-duty transport vehicle.

[0010] The frequency converter and the relay are respectively connected to the control module for communication.

[0011] Furthermore, two through holes are respectively provided on the support plate at positions corresponding to the left steering wheel and the right steering wheel; the left steering wheel includes a first steel wheel, two first bearings, a second bearing, a first connecting shaft, a rotating shaft and a first bearing seat; the first connecting shaft passes through the center of the first steel wheel and is fixedly connected to the first steel wheel; the first bearing seat is a U-shaped structure with an opening facing downward, and its two side walls are respectively provided with mounting holes that are adapted to the outer ring of the first bearing; the inner rings of the two first bearings are respectively fixedly connected to the two ends of the first connecting shaft, and the outer rings are arranged in the mounting holes and respectively fixedly connected to the first bearing seats; the second bearing is arranged in the corresponding through hole, its outer ring is fixedly connected to the support plate, and the inner ring is fixedly connected to the upper end of the rotating shaft; the lower end of the rotating shaft is fixedly connected to the top of the first bearing seat; the right steering wheel has the same structure as the left steering wheel.

[0012] Furthermore, it also includes a bearing seat mounting plate; the rear side of the bearing seat mounting plate is fixedly connected to the rotating shaft of the left steering wheel and the rotating shaft of the right steering wheel respectively; the steering drive device includes an electric push rod, a guide member and two connecting plates; the control end of the electric push rod is arranged on the front end side wall of the support plate, and the control end is connected to the output end of the relay; the front side of the guide member is hinged to the telescopic end of the electric push rod, and the rear side of the guide member is hinged to one end of the two connecting plates respectively; the other ends of the two connecting plates are respectively hinged to the front side of the bearing seat mounting plate; the control end of the electric push rod is connected to the relay.

[0013] Furthermore, it also includes a steering limit switch; the steering limit switch is communicatively connected with the control end of the relay and the electric push rod respectively.

[0014] Furthermore, the control mode of the relay is wire control;

[0015] Alternatively, the relay is controlled wirelessly;

[0016] Also included is a remote control and a wireless control module disposed in the relay;

[0017] The remote controller and the wireless control module are respectively connected to the control module for communication.

[0018] Furthermore, the electric drive device adopts a variable frequency reduction motor;

[0019] Alternatively, the electric drive device adopts a DC reduction motor,

[0020] Also included is a battery disposed in the electric control box;

[0021] The power supply end of the DC reduction motor is connected to the battery, and the output end is connected to the control end of the differential.

[0022] Furthermore, the left drive wheel includes a second steel wheel, two third bearings, a second connecting shaft and a second bearing seat; the second connecting shaft passes through the center of the second steel wheel and is fixedly connected to the second steel wheel; the second bearing seat is a U-shaped structure with an opening facing downward, and its two side walls are respectively provided with mounting holes that are compatible with the outer ring of the third bearing, and the top of the U is fixedly connected to the bottom of the support plate; the inner rings of the two third bearings are respectively fixedly connected to the two ends of the second connecting shaft, and the outer rings are arranged in the mounting holes and are respectively fixedly connected to the second bearing seats; the right drive wheel has the same structure as the left drive wheel; the second connecting shaft of the left drive wheel and the second connecting shaft of the right drive wheel are respectively connected to the output end of the differential.

[0023] Furthermore, the support plate includes a frame formed of square tubes and a steel plate wrapped around the outside of the frame.

[0024] Furthermore, the wheelbase between the steering wheel and the driving wheel is less than or equal to 740 mm; the wheelbase between the left driving wheel and the right driving wheel is less than or equal to 580 mm; the thickness of the steel plate is greater than or equal to 8 mm, and there are no less than 8 square tubes.

[0025] Furthermore, it also includes rubber tires respectively arranged on the driving wheel and the steering wheel; the thickness of the bearing seat mounting plate is not less than 10 mm.

[0026] Beneficial effects of the utility model:

[0027] 1. The utility model relates to a heavy-load transport trolley for transporting heavy loads through narrow passages. The wheelbase design of the driving wheels and the steering wheels achieves a turning radius of less than 1 meter. The steering drive device, which adjusts the steering wheel angle in situ and corrects the steering wheel angle by displacement, enables the heavy-load transport trolley to pass smoothly through narrow passages with a width of 1.2 to 1.5 meters and right-angle bends.

[0028] 2. The utility model is a heavy-load transport trolley used for narrow channel transportation, which has a carrying capacity of tons of weight, can output large torque, is safe at low speed, and has high overload capacity.

[0029] 3. The utility model is a heavy-duty transport cart for narrow channel transportation, which can transport 4 to 6 tons of radioactive source transport containers. Transportation in narrow mazes will effectively reduce the safety risks and exposure doses of operators, greatly ensuring the operational safety and radiation safety of personnel.

[0030] 4. The utility model is a heavy-load transport trolley for narrow channel transportation. When the relay control method adopts wire control, reliable control of a distance greater than or equal to 10 to 30 meters can be achieved; wireless remote control can also be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of an embodiment of a heavy-load transport trolley for narrow channel transportation according to the present utility model;

[0032] Figure 2 This is a schematic diagram of the bottom structure of an embodiment of a heavy-load transport trolley for narrow channel transportation according to the present utility model;

[0033] Figure 3 This is a top view of an embodiment of a heavy-load transport trolley for narrow channel transport according to the present utility model;

[0034] Figure 4 The utility model is a side view of an embodiment of a heavy-load transport trolley for narrow channel transportation.

[0035] Description of reference numerals:

[0036] 1- support plate, 2- driving wheel, 21- left driving wheel, 211- second steel wheel, 212- third bearing, 213- second bearing seat, 214- second connecting shaft, 22- right driving wheel, 3- differential, 4- steering wheel, 41- left steering wheel, 411- first steel wheel, 412- first bearing, 413- second bearing, 414- first bearing seat, 415- first connecting shaft, 416- rotating shaft, 42- right steering wheel, 6- electric control box, 7- steering drive device, 71- electric push rod, 72- guide member, 73- connecting plate, 5- electric drive device, 8- bearing seat mounting plate. DETAILED DESCRIPTION

[0037] like Figures 1 to 4As shown, a heavy-load transport trolley for narrow channel transfer includes a control module, a pallet 1, a driving wheel 2 arranged at the bottom of the pallet 1, a differential 3, a steering wheel 4, an electric drive device 5, an electric control box 6, and a bearing seat mounting plate 8, a steering limit switch, and a steering drive device 7 arranged at the front side of the pallet 1; the driving wheel 2 includes a left driving wheel 21 and a right driving wheel 22 arranged on both sides of the rear end of the bottom of the pallet 1, and the steering wheel 4 includes a left steering wheel 41 and a right steering wheel 42 arranged on both sides of the front end of the bottom of the pallet 1. The electric control box 6 is provided with a frequency converter. The inverter and relay are connected; the input end of the inverter is used to be connected to the external 380V power supply, and the output end is connected to the differential 3 through the electric drive device 5; the output end of the differential 3 is connected to the left drive wheel 21 and the right drive wheel 22 respectively; the input end of the relay is used to be connected to the external 220V power supply, and the output end is connected to the control end of the steering drive device 7; the output end of the steering drive device 7 is connected to the left steering wheel 41 and the right steering wheel 42 respectively, for realizing left and right steering control of the heavy-load transport vehicle; the inverter and relay are respectively connected to the control module for communication.

[0038] Two through holes are respectively provided on the support plate 1 at positions corresponding to the left steering wheel 41 and the right steering wheel 42; the left steering wheel 41 includes a first steel wheel 411, two first bearings 412, a second bearing 413, a first connecting shaft 415, a rotating shaft 416 and a first bearing seat 414; the first connecting shaft 415 passes through the center of the first steel wheel 411 and is fixedly connected to the first steel wheel 411; the first bearing seat 414 is a U-shaped structure with an opening facing downward, and its two side walls are respectively provided with mounting holes adapted to the outer rings of the first bearings 412; the inner rings of the two first bearings 412 are respectively fixedly connected to the two ends of the first connecting shaft 415, and the outer rings are arranged in the mounting holes and respectively fixedly connected to the first bearing seats 414; the second bearing 413 is arranged in the corresponding through hole, its outer ring is fixedly connected to the support plate 1, and the inner ring is fixedly connected to the upper end of the rotating shaft 416; the lower end of the rotating shaft 416 is fixedly connected to the top of the first bearing seat 414; the right steering wheel 42 has the same structure as the left steering wheel 41.

[0039] The bearing seat mounting plate 8 is no less than 10 mm thick, and its rear side is fixedly connected to the rotating shaft 416 of the left steering wheel 41 and the rotating shaft 416 of the right steering wheel 42. The steering drive device 7 includes an electric push rod 71, a guide member 72, and two connecting plates 73. The control end of the electric push rod 71 is set on the front side wall of the support plate 1 and is connected to the output end of the relay. The front side of the guide member 72 is hinged to the telescopic end of the electric push rod 71, and the rear side of the guide member 72 is hinged to one end of the two connecting plates 73 respectively. The other ends of the two connecting plates 73 are respectively hinged to the front side of the bearing seat mounting plate 8. The control end of the electric push rod 71 is connected to the relay. The steering limit switch is respectively connected to the relay and the control end of the electric push rod 71 to achieve turning angle adjustment, with an adjustable range of less than or equal to ±40°.

[0040] The left driving wheel 21 includes a second steel wheel 211, two third bearings 212, a second connecting shaft 214 and a second bearing seat 213; the second connecting shaft 214 passes through the center of the second steel wheel 211 and is fixedly connected to the second steel wheel 211; the second bearing seat 213 is a U-shaped structure with an opening facing downward, and its two side walls are respectively provided with mounting holes adapted to the outer ring of the third bearing 212, and the top of the U is fixedly connected to the bottom of the support plate 1; the inner rings of the two third bearings 212 are respectively fixedly connected to the two ends of the second connecting shaft 214, and the outer rings are arranged in the mounting holes and are respectively fixedly connected to the second bearing seats 213; the right driving wheel 22 has the same structure as the left driving wheel 21; the second connecting shaft 214 of the left driving wheel 21 and the second connecting shaft 214 of the right driving wheel 22 are respectively connected to the output end of the differential 3.

[0041] The electric drive device 5 adopts a variable frequency reduction motor, which has the characteristics of large output torque, low speed, safety and high overload capacity, and can drive the drive wheel 2 forward or backward at a low speed; in other embodiments, in order to eliminate the need for an external power supply during use, a battery is also provided in the electrical control box 6, and the electric drive device 5 adopts a DC reduction motor, the power supply end of the DC reduction motor is connected to the battery, and the output end is connected to the control end of the differential 3.

[0042] Two electrical control boxes 6 are symmetrically located on either side of the electric drive unit 5. One electrical control box 6 houses a frequency converter for precise speed control of the variable frequency reduction motor and 380V power supply to the variable frequency reduction motor. The other electrical control box 6 houses a relay and a power circuit breaker. The relay controls the forward and reverse rotation of the variable frequency reduction motor and the left and right steering of the electric push rod 71. The power circuit breaker provides 380V and 220V voltages, respectively connected to the input terminals of the frequency converter and relay. The relay is controlled by wired control. The control wire is adjustable according to operating conditions. When the control wire is greater than or equal to 10m, remote control of greater than or equal to 10m is possible, providing high reliability. Preferably, the relay control wire can be extended to 30m, enabling wired control over distances of 10-30m. In other embodiments, the relay is controlled wirelessly, including a remote control and a wireless control module located in the relay. The remote control and the wireless control module are each connected to the control module for wireless remote control.

[0043] During operation, when the heavy-load transport trolley turns left, the control module controls the electric push rod 71 to extend, and when the heavy-load transport trolley turns right, the control module controls the electric push rod 71 to retract; when the wheelbase of the steering wheel 4 and the driving wheel 2 is less than or equal to 740mm, and the wheelbase of the left driving wheel 21 and the right driving wheel 22 is less than or equal to 580mm, a turning radius of less than 1m can be achieved; based on the steering drive device 7, the angle and front and rear displacement of the steering wheel 4 are adjusted on the spot, and the angle of the steering wheel 4 is corrected, so that the heavy-load transport trolley can pass smoothly in a narrow channel with a width of 1.2 to 1.5m and a right-angle turn.

[0044] In this embodiment, the support plate 1 includes a frame composed of square tubes and a steel plate wrapped around the outside of the frame. It is a two-layer steel structure that can carry heavy containers of 1 to 10 tons; the two-layer steel structure is composed of steel plates and 50mm×50mm square tubes; the steel plate brand is A3#, and the thickness of the steel plate is greater than or equal to 8mm; the 50mm×50mm square tube brand is 45#, and there are no less than 8 50mm×50mm square tubes.

[0045] Preferably, the four first bearings 412 and the two second bearings 413 are symmetrically distributed, the first bearing 412 is used to realize axial load-bearing; the second bearing 413 is used to realize radial load-bearing and left and right steering; the first bearing 412 and the second bearing 413 both adopt deep groove ball bearings, which have strong stability; the four third bearings 212 all adopt deep groove ball bearings, which are symmetrically distributed, and their inner diameters are all greater than or equal to φ40mm, which have strong stability and can realize axial load-bearing and forward and backward drive.

[0046] The utility model is a heavy-load transport trolley for narrow channel transportation. It is a square transport vehicle with a height of about 350mm. It has a load-bearing capacity of tons, a turning radius of less than 1m, and a control capability of a distance greater than or equal to 10m. It can transport tons of radioactive source transport containers in narrow channels with a width of 1.2 to 1.5m and right-angle bends.

[0047] If the pavement in a narrow passage is uneven, the diameters of the drive wheels 2 and steer wheels 4 can be increased or rubber tires can be installed on them to improve their ability to navigate obstacles. If the load requirement is reduced, the inner diameters of the bearings, drive wheels 2, and steer wheels 4 can be reduced accordingly. Using a heavy-duty transport cart for transporting 4- to 6-ton radioactive source containers through narrow mazes effectively ensures both operational and radiation safety.

Claims

1. A heavy-load transport vehicle for narrow channel transport, characterized by: The vehicle comprises a control module, a support plate (1), a driving wheel (2) arranged at the bottom of the support plate (1), a differential (3), a steering wheel (4), an electric drive device (5), an electric control box (6), and a steering drive device (7) arranged at the front side of the support plate (1); The driving wheel (2) comprises a left driving wheel (21) and a right driving wheel (22) which are arranged on both sides of the rear end of the bottom of the support plate (1); The steering wheel (4) comprises a left steering wheel (41) and a right steering wheel (42) arranged on both sides of the front end of the bottom of the support plate (1); The electric control box (6) is provided with a frequency converter and a relay; the frequency converter input end is used to be connected to an external 380V power supply, and the output end is connected to the differential (3) through the electric drive device (5); the output end of the differential (3) is respectively connected to the left drive wheel (21) and the right drive wheel (22); the relay input end is used to be connected to an external 220V power supply, and the output end is connected to the control end of the steering drive device (7); the output end of the steering drive device (7) is respectively connected to the left steering wheel (41) and the right steering wheel (42) for realizing left and right steering control of the heavy-load transport vehicle; The frequency converter and the relay are respectively connected to the control module for communication.

2. A heavy-load transport vehicle for narrow channel transport according to claim 1, characterized in that: Two through holes are respectively provided on the support plate (1) at positions corresponding to the left steering wheel (41) and the right steering wheel (42); The left steering wheel (41) includes a first steel wheel (411), two first bearings (412), a second bearing (413), a first connecting shaft (415), a rotating shaft (416) and a first bearing seat (414); The first connecting shaft (415) passes through the center of the first steel wheel (411) and is fixedly connected to the first steel wheel (411); The first bearing seat (414) is a U-shaped structure with an opening facing downward, and its two side walls are respectively provided with mounting holes adapted to the outer ring of the first bearing (412); The inner rings of the two first bearings (412) are respectively fixedly connected to the two ends of the first connecting shaft (415), and the outer rings are arranged in the mounting holes and are respectively fixedly connected to the first bearing seats (414); The second bearing (413) is arranged in the corresponding through hole, the outer ring of which is fixedly connected to the support plate (1), and the inner ring is fixedly connected to the upper end of the rotating shaft (416); the lower end of the rotating shaft (416) is fixedly connected to the top of the first bearing seat (414); The right steering wheel (42) has the same structure as the left steering wheel (41).

3. A heavy-load transport vehicle for narrow channel transport according to claim 2, characterized in that: It also includes a bearing seat mounting plate (8); the rear side of the bearing seat mounting plate (8) is respectively fixedly connected to the rotating shaft (416) of the left steering wheel (41) and the rotating shaft (416) of the right steering wheel (42); The steering drive device (7) includes an electric push rod (71), a guide member (72) and two connecting pieces (73); The control end of the electric push rod (71) is arranged on the front side wall of the support plate (1), and the control end is connected to the output end of the relay; The front side of the guide member (72) is hinged to the telescopic end of the electric push rod (71), and the rear side of the guide member (72) is hinged to one end of two connecting pieces (73); the other ends of the two connecting pieces (73) are hinged to the front side of the bearing seat mounting plate (8); The control end of the electric push rod (71) is connected to a relay.

4. A heavy-load transport vehicle for narrow channel transport according to claim 3, characterized in that: Also includes steering limit switches; The steering limit switch is communicatively connected to the control end of the relay and the electric push rod (71) respectively.

5. A heavy-load transport vehicle for narrow channel transport according to any one of claims 1 to 4, characterized in that: The control mode of the relay is wire control; Alternatively, the relay is controlled wirelessly; Also included is a remote control and a wireless control module disposed in the relay; The remote controller and the wireless control module are respectively connected to the control module for communication.

6. A heavy-load transport vehicle for narrow channel transport according to claim 5, characterized in that: The electric drive device (5) adopts a variable frequency reduction motor; Alternatively, the electric drive device (5) adopts a DC reduction motor, Also included is a storage battery arranged in the electric control box (6); The power supply end of the DC reduction motor is connected to the battery, and the output end is connected to the control end of the differential (3).

7. A heavy-load transport vehicle for narrow channel transport according to claim 6, characterized in that: The left driving wheel (21) comprises a second steel wheel (211), two third bearings (212), a second connecting shaft (214) and a second bearing seat (213); The second connecting shaft (214) passes through the center of the second steel wheel (211) and is fixedly connected to the second steel wheel (211); The second bearing seat (213) is a U-shaped structure with an opening facing downward, and its two side walls are respectively provided with mounting holes adapted to the outer ring of the third bearing (212), and the top of the U-shaped structure is fixedly connected to the bottom of the support plate (1); The inner rings of the two third bearings (212) are respectively fixedly connected to the two ends of the second connecting shaft (214), and the outer rings are arranged in the mounting holes and are respectively fixedly connected to the second bearing seats (213); The right driving wheel (22) has the same structure as the left driving wheel (21); The second connecting shaft (214) of the left driving wheel (21) and the second connecting shaft (214) of the right driving wheel (22) are respectively connected to the output end of the differential (3).

8. A heavy-load transport vehicle for narrow channel transport according to claim 7, characterized in that: The support plate (1) comprises a frame formed of square tubes and a steel plate wrapped around the outside of the frame.

9. A heavy-load transport vehicle for narrow channel transport according to claim 8, characterized in that: The wheelbase of the steering wheel (4) and the driving wheel (2) is less than or equal to 740 mm; The wheelbase of the left driving wheel (21) and the right driving wheel (22) is less than or equal to 580 mm; The thickness of the steel plate is greater than or equal to 8 mm, and there are no less than 8 square tubes.

10. The heavy-load transport vehicle for narrow channel transport according to claim 3, characterized in that: It also includes rubber tires respectively arranged on the driving wheel (2) and the steering wheel (4); The thickness of the bearing seat mounting plate (8) is not less than 10 mm.

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