Power control device of self-discharging container

Abstract

A power control device of a self-discharging container belongs to the field of transportation tools and comprises a control box and a remote controller. The control box is installed in the box frame and connected with the box frame. A control box power supply, a control box wireless communication unit, a control box wireless communication antenna, a control unit, a motor relay, a first oil pump electromagnetic valve, a second oil pump electromagnetic valve, an inner oil cylinder position sensor, an outer oil cylinder position sensor, an inner driving electromagnetic valve, an outer driving electromagnetic valve, a rear door opening electromagnetic valve and a rear door closing electromagnetic valve are mounted in the control box; the control box power supply is arranged in the control box and is connected with electric elements inside and outside the control box through wires; the wireless remote controller has the characteristics of capability of realizing wireless remote control, powerful function and convenience in operation.

Description

Technical Field

[0001] The present invention belongs to the field of transportation means, and particularly relates to a power control device for a freight container with a self-unloading function. Background Art

[0002] In the freight transportation field, in order to reduce the occupation of transportation vehicles, the use of container transportation has been invented, which greatly improves the transportation efficiency; in order to more conveniently realize the transportation of goods, especially the unloading problem during the transportation of bulk goods, a freight container with a self-unloading function, abbreviated as a self-unloading freight container, has been invented, which further improves the efficiency of bulk goods transportation, reduces the labor intensity of unloading, and reduces the unloading time; on the other hand, in order to standardize the types and specifications of vehicles for goods transportation in our country, corresponding specifications have been made for the vehicles engaged in freight transportation business and the structures and types of freight containers, and corresponding standards have been formulated. At the same time, it is required that vehicles and freight containers that do not meet the standard regulations are not allowed to engage in freight transportation business; therefore, a variety of freight containers that meet national standards and have a self-unloading function have been developed, generally including side-tipping self-unloading containers, rear-tipping freight containers, and crawler-type flat-pushing freight containers; most of the existing crawler-type flat-pushing freight containers adopt a fixed box body skeleton, and rely on power to push the unloading push plate together with the crawler at the bottom of the cargo box towards the rear door direction, so as to push the goods in the freight container to the rear door of the freight container. The rear door is opened, and the goods are unloaded from the rear door along with the movement of the cargo push plate to realize the unloading function; its power mostly adopts a hydraulic motor to drive a roller, the roller drives the crawler, and drives the push plate to realize unloading; there is also a motor used as power to drive the power roller to drive the crawler through a speed reducer; there is also a hydraulic cylinder used to drive one end of the crawler, and drive the crawler by traction to drive the push plate to realize unloading; the following defects are found in the use of the existing crawler-type self-unloading freight container. First, the hydraulic motor and the motor used as power drive are large in volume, heavy in weight, and high in manufacturing cost; the hydraulic cylinder is divided into two types. One is a single cylinder drive. This type of cylinder is large in volume and has a too long stroke, resulting in the need to add auxiliary supports during installation and operation, and also has the problem of large volume and heavy weight. Because the weight has an impact on freight transportation, it causes a large amount of useless work for the tractor, wasting energy; while the developed one using two cylinders for drive uses a double-acting cylinder, which has a high cost of the cylinder, complex control, is prone to failures, and will cause uneven pushing power of the two cylinders, resulting in uneven stress on the moving parts, serious wear, and seriously causing unloading blockage. Summary of the Invention

[0003] In view of the above problems existing in the existing crawler-type self-unloading freight box driven by oil cylinders, the present invention proposes a crawler-type self-unloading freight box driven by multiple oil cylinders (which reduces the weight and manufacturing cost of the oil cylinders) and capable of balanced driving. The specific technical solution is as follows: A self-unloading freight box, the self-unloading freight box includes a box frame, a push plate, a right side wall, crawlers, a rear door, a left side wall, a driving device, a bottom cross beam and a bottom longitudinal beam; the box frame is the skeleton of this freight box, which can support and install the structural components of this freight box and be docked with the skeleton vehicle; the push plate is installed at the front end of the freight box and is located inside the box frame, and can move back and forth along the box frame; the right side wall is installed on the right side of the box frame, which can enclose the right side of the box frame, and together with the push plate, the rear door, the crawlers and the left side wall forms a box volume cavity; the crawlers are installed inside the box frame and at the bottom of the box frame; the crawlers are flexible bodies, one end is connected to the push plate, and the other end is connected to the front end of the skeleton of the driving device to form a closed loop, and can move together with the push plate at the bottom of the box frame as the push plate moves; the rear door is installed at the tail of the box frame, the upper part is hinged to the box frame, and the lower end is buckled to the bottom of the box frame through a lock, and the lock can be opened or locked by power; the left side wall is installed on the left side of the box frame, which can enclose the left side of the box frame, and together with the push plate, the right side wall, the crawlers and the rear door forms the loading volume cavity of this freight box.

[0004] The driving device is installed at the bottom of the box frame and is located under the push plate, and is connected to the push plate through the skeleton on the driving device; the driving device includes a skeleton, driving oil cylinders, driving hooks and a linkage device; the skeleton is of a frame type, which can support and install the components of the driving device; one end of the skeleton is connected to the push plate and is placed on the bottom longitudinal beam / bottom cross beam of the box frame, and can move back and forth along the direction of the bottom longitudinal beam; the driving oil cylinders are installed on the skeleton, connected to the skeleton and connected to the hydraulic system; there are multiple driving oil cylinders, which are single-acting hydraulic cylinders (which can reduce the weight of the oil cylinders and disperse the driving force to improve the driving stability and softness), arranged in groups, and the groups are arranged in pairs and symmetrically along the movement center line of the skeleton, and the number of them is even. The working sequences of the two oil cylinders in each pair of oil cylinders are opposite, that is, when the piston rod of one oil cylinder extends outwards, the piston rod of the other (group) oil cylinder paired with it should retract inwards; the driving hooks are installed on the oil cylinders, connected to the cylinder body or the piston rod of the oil cylinder, and intermittently hooked or disengaged from the bottom longitudinal beam to realize the driving or return of the oil cylinder; the linkage device is installed on the skeleton, fixedly connected to the skeleton, and its moving parts are respectively connected to the two (groups) of paired oil cylinders.

[0005] The described driving device further includes a hydraulic system and a pneumatic system; the hydraulic system is installed inside the box frame and includes a motor, a hydraulic oil pump, a hydraulic solenoid valve, a hydraulic pipeline, and an oil tank; the pneumatic system includes a compressed air interface, a pneumatic solenoid valve, a reversing cylinder, and a pneumatic pipeline; the components and installation methods of the hydraulic system and the pneumatic system are all prior arts in this field.

[0006] The described bottom cross beam is installed at the bottom of the box frame, there are multiple ones, arranged horizontally in parallel, and both ends are respectively connected to the bottom longitudinal beam and / or the side wall of the box frame; the described bottom longitudinal beam is installed at the bottom of the box frame, there are more than two, arranged longitudinally, and connected to the bottom cross beam or the side wall of the box frame.

[0007] To cooperate with the aforementioned driving device, the present invention provides a power control device for a self-unloading freight box, characterized in that: the power control device includes a control box and a remote controller; the control box is installed inside the box frame and connected to the box frame; inside the control box, there are installed a control box power supply, a control box wireless communication unit, a control box wireless communication antenna, a control unit, a motor relay, a first oil pump solenoid valve, a second oil pump solenoid valve, an inner oil cylinder position sensor, an outer oil cylinder position sensor, an inner drive solenoid valve, an outer drive solenoid valve, a rear door opening solenoid valve, and a rear door closing solenoid valve; the control box power supply is installed inside the control box and connected to the electrical components inside and outside the control box through wires; the control box power supply is a battery or a power interface; the wireless communication units are respectively installed on the control box and the remote controller and connected to the wireless communication antenna and the control unit; the wireless communication antennas are respectively installed on the control box and the remote controller and connected to the wireless communication unit; the control unit, installed inside the control box, can convert the wireless signals transmitted by the remote controller into instructions for controlling the actuating elements and work according to a predetermined program; the motor relay is installed on the control box or the driving device and connected to the control unit and the oil pump motor, and can control the working state of the oil pump motor; the first oil pump solenoid valve is installed inside the hydraulic system, which is the electric control part of the oil pump solenoid valve and connected to the control unit, and can control the working state of the first oil pump solenoid valve under the instruction of the control unit; the second oil pump solenoid valve is the same as the first oil pump solenoid valve and can be interchanged with the first oil pump solenoid valve to adapt to different working procedures; the inner oil cylinder position sensor is installed on the inner side driving oil cylinder or the skeleton of the driving device, and can detect the allowable value of the extension stroke of the inner side driving oil cylinder and transmit the corresponding signal to the control unit; the outer oil cylinder position sensor is installed on the outer side driving oil cylinder or the skeleton of the driving device, and can collect the allowable stroke position of the outer side driving oil cylinder and transmit the signal to the control unit; the inner drive solenoid valve is installed inside the control box or the skeleton of the driving device, the circuit part is connected to the control unit, and the air circuit is connected to the reversing cylinder installed on the inner side driving oil cylinder of the pneumatic system, and can control the working state of the inner side reversing cylinder; the outer drive solenoid valve is installed inside the control box or the skeleton of the driving device, the circuit part is connected to the control unit, and the air circuit is connected to the reversing cylinder installed on the outer side driving oil cylinder of the pneumatic system, and can control the working state of the outer side reversing cylinder; the rear door opening solenoid valve is installed inside the control box or on the box frame, the circuit is connected to the control unit, and the air circuit is connected to the rear door opening driving cylinder of the pneumatic system, and can control the working state of the rear door opening driving cylinder; the rear door closing solenoid valve is installed on the control box or the box frame, the circuit is connected to the control unit, and the air circuit is connected to the rear door closing cylinder, and can control the working state of the driving cylinder for closing the rear door.

[0008] The remote controller described above is a handheld type, including a housing, a first button, a second button, a third button, a fourth button, a wireless communication antenna, a remote controller power supply, and a wireless communication unit; the housing is a cavity body that can accommodate the functional components of the remote controller, and is provided with holes through which the buttons can protrude; the first button, the second button, the third button, and the fourth button are respectively function buttons, and the number and functions of the buttons are set respectively according to actual applications, and the connection methods of each button with the wireless communication unit can be swapped; the wireless communication antenna is installed inside the remote controller housing and is paired with the wireless communication antenna installed on the control unit; the power supply is a battery installed inside the housing and is connected to the wireless communication unit to provide electrical energy for the remote controller; the wireless communication unit is installed inside the housing, is connected to the power supply and the wireless communication antenna, and is paired with the wireless communication unit installed inside the control box for use.

[0009] Further, an indicator light is also installed on the housing, and the indicator light is connected to the wireless communication unit or the display module.

[0010] Further, the functions of the first button, the second button, the third button, and the fourth button can be interchanged.

[0011] Further, the number of the buttons matches the function items of the driving device.

[0012] For the direction indicators such as front, back, left, right, up, and down in this article, when the vehicle is moving forward normally, the forward direction is regarded as the front and referred to in turn.

[0013] Advantageous Effects

[0014] The advantageous effects of the present invention are that it can reduce the total weight of the driving device, thereby reducing the manufacturing cost, and can generate a gentle driving force; at the same time, it is convenient to operate, realizes remote control, and improves safety and the overall degree of automation. Description of the Drawings

[0015] Figure 1 is a schematic diagram of the external structure of the self-unloading freight box of the present invention

[0016] Figure 2 is a schematic diagram of the structure of the freight box after removing part of the front baffle of the present invention

[0017] Figure 3 is a schematic diagram of the bottom structure of the present invention

[0018] Figure 4 is a schematic diagram of the structure of an embodiment of the driving device of the present invention

[0019] Figure 5 is a schematic diagram of the structural principle of the control box of the control device

[0020] Figure 6 Schematic diagram of the mechanism principle of the remote controller of the control device

[0021] 1. Box frame, 2. Pusher plate, 3. Right side wall, 4. Crawler belt, 5. Rear door, 6. Left side wall, 7. Driving device, 8. Bottom cross beam, 9. Bottom longitudinal beam, 10. Crawler belt end reversing wheel, 71. Skeleton, 72. Outer left driving oil cylinder, 73. Outer left driving hook, 74. Inner left driving oil cylinder, 75. Inner left driving hook, 76. Inner right driving hook, 77. Outer right driving oil cylinder, 78. Reversing wheel, 79. Mounting frame, 710. Steel wire rope, 211. Control box power supply, 212. Motor relay, 213. First oil pump solenoid valve, 214. Inner oil cylinder position sensor, 215. Second oil pump solenoid valve, 216. Control box housing, 217. Control box wireless communication antenna, 218. Control box wireless communication unit, 219. Control unit, 210. Rear door opening solenoid valve, 2101. Rear door closing solenoid valve, 2102. Outer drive reversing solenoid valve, 2103. Inner drive reversing solenoid valve, 2104. Outer oil cylinder position sensor, 220. Outer shell, 221. Remote controller power supply, 222. Remote controller wireless communication unit, 223. Connecting element, 224. Fourth button, 225. Third button, 226. Remote controller wireless communication antenna, 227. Second button, 228. First button, 229. Connecting wire. Detailed implementation manner

[0022] In order to better illustrate the technical solution of the present invention, the specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings, as Figures 1 - 6, in this example, a general hydraulic drive system in the industry is selected as the hydraulic system of this example, and a general pneumatic system in the industry is selected as the pneumatic system of this example. The compressed air on the tractor is used as the power gas of the pneumatic system, and the hydraulic system and the pneumatic system are installed and connected according to the general method in the industry. The selected power control device includes a control box and a remote controller. The control box is installed in the box frame 1 and connected to the box frame 1. Inside the control box, there are installed a control box power supply 211, a control box wireless communication unit 218, a control box wireless communication antenna 217, a control unit 219, a motor relay 212, a first oil pump solenoid valve 213, a second oil pump solenoid valve 215, an inner cylinder position sensor 214, an outer cylinder position sensor 2104, an inner drive reversing solenoid valve 2103, an outer drive reversing solenoid valve 2102, a rear door opening solenoid valve 210, and a rear door closing solenoid valve 2101. The control box power supply 211 is installed inside the control box and is connected to the electrical components of the drive device inside and outside the control box through wires. The control box power supply 211 is a battery or a power interface. The wireless communication units (divided into a control box wireless communication unit 218 and a remote controller wireless communication unit 222 in the reference numerals) are respectively installed on the control box and the remote controller and are connected to the wireless communication antenna and the control unit 219. The wireless communication antennas (divided into a control box wireless communication antenna 217 and a remote controller wireless communication antenna 226 in the reference numerals) are respectively installed on the control box and the remote controller and are connected to the corresponding wireless communication units. The control unit 219 is installed inside the control box and can convert the wireless signal transmitted by the remote controller into an instruction for controlling the actuating element and work according to a predetermined program. The control unit 219 in this example can be a PLC, a single-chip microcomputer, or a single-board computer. The motor relay 212 is installed on the control box or the drive device 7 and is connected to the control unit 219 and the oil pump motor, and can control the working state of the oil pump motor. The first oil pump solenoid valve 213 is installed in the hydraulic system and is the electric control part of the oil pump solenoid valve and is connected to the control unit 219, and can control the working state of the valve body part of the first oil pump solenoid valve 212 under the instruction of the control unit 219, that is, the flow direction of the hydraulic oil flowing through the inside of the first oil pump solenoid valve. The second oil pump solenoid valve 215 is the same as the first oil pump solenoid valve 213 and can be interchanged with the first oil pump solenoid valve 213 to adapt to different working procedures. The inner cylinder position sensor 214 is installed on the inner drive cylinder 74 or the frame 71 of the drive device 7 and can detect the set value of the extension stroke of the inner drive cylinder 74 and transmit the corresponding signal to the control unit 219. The outer cylinder position sensor 2104 is installed on the outer drive cylinder 72 or the frame 71 of the drive device 7 and can collect the end position of the permitted stroke of the outer drive cylinder 72 and transmit the signal to the control unit 219;The aforementioned position sensor can be a proximity switch, a mechanical microswitch, an optoelectronic sensor, etc.; the inner drive solenoid valve 2103 is installed in the control box or on the framework 71 of the drive device 7, and is a component of the pneumatic system. Its circuit part is connected to the control unit 219, and its pneumatic part is connected to the reversing cylinder installed on the inner side drive oil cylinder 74, capable of controlling the working state of the inner side reversing cylinder; the outer drive solenoid valve 2102 is installed in the control box or on the framework 71 of the drive device 7, its circuit part is connected to the control unit 219, and its pneumatic part is connected to the reversing cylinder installed on the outer side drive oil cylinder 72, capable of controlling the working state of the outer side reversing cylinder; the rear door opening solenoid valve 210 is installed in the control box or on the box frame 1, its circuit is connected to the control unit 219, and its pneumatic part is connected to the rear door opening drive cylinder of the pneumatic system, capable of controlling the working state of the rear door opening drive cylinder; the rear door closing solenoid valve 2101 is installed on the control box or the box frame 1, its circuit is connected to the control unit 219, and its pneumatic part is connected to the rear door closing cylinder, capable of controlling the working state of the drive cylinder for rear door closing; in this example, the remote controller selected is a handheld type, including a housing 220, a first button 228, a second button 227, a third button 225, a fourth button 224, a remote control wireless communication antenna 226, a remote controller power supply 221, and a remote control wireless communication unit 222; in this example, the selected housing 220 is a cavity body made of plastic, with its interior provided to accommodate and install the functional elements of this remote controller. It is a two - half structure, and its upper cover is provided with holes through which the buttons can be seen; the remote controller buttons commonly used in this industry are selected as the first button 228, the second button 227, the third button 225, and the fourth button 224 in this example. The number and functions of its buttons can be set respectively according to actual applications, and the connection methods between each button and the wireless communication unit can be swapped to achieve different function inputs; in this example, the function of the first button 228 is set as the motor start - stop button; the second button 227 is the reversing button for the first oil pump solenoid valve 213 and the second oil pump solenoid valve 215; the third button is the start and reversing button for the inner drive reversing solenoid valve 2103 and the outer drive reversing solenoid valve 2102; the fourth button 224 is the control button for the rear door opening solenoid valve 210 and the rear door closing solenoid valve 2101; the wireless communication antenna is installed inside the remote controller housing and is paired with the wireless communication antenna installed in the control box; the selected remote controller power supply 221 is a battery, installed inside the housing 220, connected to the remote controller wireless communication unit 222, and capable of providing electrical energy for the remote controller; the wireless communication unit is installed inside the housing 220, connected to the remote controller power supply 220 and the remote controller wireless communication antenna 226, and paired with the wireless control box communication unit 218 installed in the control box; thus, the implementation of the present invention is completed.;

[0023] In this example, the frame, push plate, right side wall, left side wall, crawler belt, rear door, bottom cross beam and bottom longitudinal beam of a general-purpose crawler-type self-unloading freight container in this industry are respectively used as the frame 1, push plate 2, right side wall 3, left side wall 6, crawler belt 4, rear door 5, bottom cross beam 8 and bottom longitudinal beam 9 of this example, and are assembled in accordance with the general assembly method in this industry to form a freight container; in this example, a driving device 7 is selected and installed at the bottom of the frame 1 and under the push plate 2, and is connected to the push plate 2 through the skeleton 71 on the driving device 7; the selected driving device 7 includes a skeleton 71, driving oil cylinders (including 72, 74 and 77), driving hooks and a linkage device; in this example, the selected skeleton 71 is a general-purpose frame-type structure in this field, which can support and install the components of the driving device; one end of the skeleton 71 is connected to the push plate and placed on the bottom longitudinal beam 9 / bottom cross beam 8 of the frame 1, and can move back and forth along the direction of the bottom longitudinal beam 9; the driving oil cylinders are installed on the skeleton 71, connected to the skeleton 71, and connected to the hydraulic system of a general-purpose self-unloading freight container in this industry; in this example, 4 driving oil cylinders are selected, divided into two groups, and both are single-acting hydraulic cylinders, which can reduce the weight and volume of the oil cylinders, disperse the driving force, thereby improving the driving stability and softness. Each group has two oil cylinders, and each pair of oil cylinders in each group is symmetrically installed along the vertical center line of the push plate. That is, the two oil cylinders in each group are installed on both sides of the center line of the push plate and are symmetric with respect to this center line. The working sequence of each pair of oil cylinders is opposite. That is, when the piston rod of one oil cylinder extends outwards, the piston rod of the other oil cylinder paired with it should retract inwards; in this example, it is selected to fixedly hinge-connect the end of the piston rod of the oil cylinder to the skeleton 71. When the oil cylinder works, the oil cylinder body is hooked to the bottom cross beam 8 through the driving hook, thereby driving the skeleton 71 to move at the bottom of the frame 1, and further driving the push plate 2 and the crawler belt 4 together with the goods loaded on the crawler belt 4 to move along the bottom longitudinal beam 9; it is also possible to hinge-connect the oil cylinder body to the skeleton 71 and install the driving hook on the piston rod, and the above functions can also be achieved, but it depends on the installation position and overall layout flexibly; in this example, a general-purpose ratchet-type hook in this industry is selected as the driving hook. In this example, according to the aforementioned fixed mode of the piston rod, it is selected to install the driving hook on the oil cylinder body, connect it to the oil cylinder body, and be able to intermittently hook or disconnect from the bottom cross beam 8 to realize the driving or return stroke of the oil cylinder; that is, when driving, the driving hook is hooked to the bottom cross beam 8, so that when the piston rod extends, the driving oil cylinder body drives the bottom cross beam 8 through the driving hook. Because the bottom cross beam 8 is fixedly connected to the frame 1 and the skeleton 71 is movable, the skeleton 71 is driven to move along the bottom longitudinal beam 9 in a disguised form, which drives the push plate 2 and the crawler belt 4 to move synchronously. The goods on the crawler belt 4 move step by step towards the rear door 5, and the goods are gradually unloaded through the opened rear door, realizing the self-unloading function; in this example, the selected linkage device includes a mounting bracket 79, a reversing wheel 78, a steel wire rope 710 and a connecting piece; the mounting bracket 79 is fixedly installed on the skeleton 71 and connected to the skeleton 71;In this example, since two sets of two oil cylinders are adopted, two linkage devices are selected and installed between the outer left drive oil cylinder 72 and the inner left drive oil cylinder 74, and between the outer right drive oil cylinder 77 and the inner right drive oil cylinder (the oil cylinder where the inner right drive hook 76 is located); the reversing wheel 78 is installed on the mounting bracket 79 and is connected to the mounting bracket 79 through a wheel axle and can rotate freely on the wheel axle; in this example, a steel wire rope commonly used in this industry is selected as the steel wire rope 710, the steel wire rope 710 is installed on the reversing wheel 78 and wound around the outer circumference of the reversing wheel 78, and both ends are respectively connected to the cylinder bodies of the outer left drive oil cylinder 72 and the inner left drive oil cylinder 74 through connecting parts; a steel wire rope connecting part commonly used in this industry is selected as the connecting part in this example, the connecting part is installed at both ends of the steel wire rope 710 and is hinged to the cylinder body; similarly, another steel wire rope 710 is respectively connected to the outer right drive oil cylinder 77 and the inner right drive oil cylinder through the reversing wheel 78 through connecting parts, thus completing the implementation of the present invention; because the single-acting oil cylinder has a simpler structure, smaller volume and lighter weight compared with the double-acting oil cylinder, however, it cannot reset itself. Due to the function of the linkage device, this defect is overcome, and multi-oil cylinder drive is adopted, which disperses the force points of the push plate 2, reduces the occupied space volume of the drive oil cylinder, reduces the manufacturing cost, reduces the overall weight of the freight container, saves energy, and at the same time meets the relevant national standards for freight containers.;

[0024] When unloading is required, the compressed air of the tractor is connected to the compressed air interface of the cargo box, and the power supply of the tractor is connected to the power supply of the drive device 7 when necessary, that is, when the drive device 7 itself has no power supply; the fourth button 224 of the remote control is pressed to ventilate the rear door opening cylinder, and the rear door opening cylinder drives the lower part of the rear door to open, and the bulk cargo will flow out from the lower part of the rear door; the first button 228 of the remote control is pressed to start the oil pump motor, and the oil pump solenoid valve drives the oil cylinder 74 (which can be a group of multiple) inwards in the default state. The inner driving cylinder 74 is filled with oil, and the piston rod of the inner driving cylinder 74 extends to push the frame 71 together with the push plate 2 to move toward the rear of the box frame 1. When the piston rod of the inner driving cylinder 74 extends to a set length (the extension length is related to the spacing distance of the bottom cross beam 8), the inner cylinder position sensor 214 is triggered to send a signal, and the control unit 219 instructs the oil pump solenoid valve to change direction, stop supplying oil to the inner driving cylinder 74, and connect the oil pipe of the inner driving cylinder 74 and the circuit of the oil tank, that is, the oil discharged from the inner driving cylinder 74 will return to the oil tank; At the same time, oil is supplied to the outer drive cylinder 72 (or a group of multiple cylinders), the piston rod of the outer drive cylinder 72 extends, and the drive frame 71 is connected to the push plate 2 and the crawler track 4 to move toward the rear of the box frame 1. Due to the action of the linkage device, while the outer drive cylinder 72 drives the frame 71 to move, the piston rod of the inner drive cylinder 74 is compressed and retracted; this step is repeated alternately until the unloading is completed; when the unloading is completed, the second button 227 of the remote control is pressed to switch the oil supply sequence and direction of the inner drive cylinder 74 and the outer drive cylinder 72. At the same time, the third button 225 of the remote control is pressed to start the reversing cylinders on the inner left driving hook 75 and the outer left driving hook 73 on the driving device 7, so that the inner and outer driving hooks are reversed, that is, the return hook is hooked on the bottom cross beam 8, and the forward hook is not hooked, thus realizing the stepping alternating motion of the return stroke until it returns to the original position, and the fourth button 224 of the remote control is pressed to start the rear door closing cylinder to close the rear door 5, thus completing an unloading process, and repeating this cycle to realize the unloading function of the remote-controlled self-unloading freight box.

Claims

1. A power control device for a self-tipping freight box, characterized in that: The described power control device includes a control box and a remote controller; the control box is installed within a box frame and is connected to the box frame; within the control box, there are installed a control box power supply, a control box wireless communication unit, a control box wireless communication antenna, a control unit, a motor relay, a first oil pump solenoid valve, a second oil pump solenoid valve, an inner oil cylinder position sensor, an outer oil cylinder position sensor, an inner drive solenoid valve, an outer drive solenoid valve, a rear door opening solenoid valve, and a rear door closing solenoid valve; the control box power supply is installed within the control box and is connected by wires to the electrical components both inside and outside the control box; the control box power supply is a battery or a power interface; the wireless communication unit is respectively installed on the control box and the remote controller and is connected to the wireless communication antenna and the control unit; the wireless communication antenna is respectively installed on the control box and the remote controller and is connected to the wireless communication unit; the control unit, installed within the control box, can convert the wireless signals transmitted by the remote controller into instructions for controlling the actuating components and operates according to a predetermined program; the motor relay is installed on the control box or the drive device and is connected to the control unit and the oil pump motor, and can control the working state of the oil pump motor; the first oil pump solenoid valve is installed within the hydraulic system, is the electrical control part of the oil pump solenoid valve, and is connected to the control unit, and can control the working state of the first oil pump solenoid valve under the instruction of the control unit; the second oil pump solenoid valve is the same as the first oil pump solenoid valve and can be interchanged with the first oil pump solenoid valve to adapt to different working procedures; the inner oil cylinder position sensor is installed on the inner drive oil cylinder or the framework of the drive device and can detect the allowable value of the extending stroke of the inner drive oil cylinder and transmit the corresponding signal to the control unit; the outer oil cylinder position sensor is installed on the outer drive oil cylinder or the framework of the drive device and can collect the permitted stroke position of the outer drive oil cylinder and transmit the signal to the control unit; the inner drive solenoid valve is installed within the control box or the framework of the drive device, the circuit part is connected to the control unit, and the air circuit is connected to the reversing cylinder installed on the inner drive oil cylinder of the pneumatic system, and can control the working state of the inner reversing cylinder; the outer drive solenoid valve is installed within the control box or the framework of the drive device, the circuit part is connected to the control unit, and the air circuit is connected to the reversing cylinder installed on the outer drive oil cylinder of the pneumatic system, and can control the working state of the outer reversing cylinder; the rear door opening solenoid valve is installed within the control box or on the box frame, the circuit is connected to the control unit, and the air circuit is connected to the rear door opening drive cylinder of the pneumatic system, and can control the working state of the rear door opening drive cylinder; the rear door closing solenoid valve is installed on the control box or the box frame, the circuit is connected to the control unit, and the air circuit is connected to the rear door closing cylinder, and can control the working state of the drive cylinder for closing the rear door; the remote controller is of a hand-held type and includes a housing, a first button, a second button, a third button, a fourth button, a wireless communication antenna, a remote controller power supply, and a wireless communication unit;The described outer shell is a cavity body that can accommodate the functional components of the remote control. It is provided with holes through which the buttons can be seen. The first button, the second button, the third button, and the fourth button are respectively function buttons. The number and functions of the buttons are set according to actual applications and can switch the connection methods of each button to the wireless communication unit. The wireless communication antenna is installed inside the remote control shell and is paired with the wireless communication antenna installed in the control device. The power source is a battery installed inside the shell and is connected to the wireless communication unit to provide electrical energy for the remote control. The wireless communication unit is installed inside the shell, connected to the power source and the wireless communication antenna, and is paired with the wireless communication unit installed in the control box.

2. The power control device of a self-tipping freight box according to claim 1, characterized in that: An indicator light is also installed on the described housing, and the indicator light is connected to the wireless communication unit or the display module.

3. The power control device of a self-unloading freight box according to claim 1, characterized in that: The functions of the first button, the second button, the third button, and the fourth button can be interchanged.

4. The power control device of a self-unloading freight box according to claim 1, characterized in that: The number of the buttons matches the function items of the driving device.

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