Driving device of self-discharging container

Abstract

A driving device of a self-discharging container belongs to the field of transportation tools and comprises a driving hook, and the driving hook comprises a mounting seat, a side bending plate, a front cylinder shaft, a side bending plate supporting shaft, a front hook pull ring, a tension spring, a reversing cylinder, a front hook, a hook shaft, a fixing plate, a fixing shaft, a mounting support, a rear hook pull ring, a rear hook and a rear cylinder shaft. The mounting seat is mounted on a cylinder body or a piston rod of the driving oil cylinder and is fixedly connected with the cylinder body or the piston rod; the side bending plate is connected with the mounting bracket through the side bending plate supporting shaft and can swing on the mounting bracket; the two side bending plates are installed on the two sides of the driving oil cylinder respectively. The driving device has the characteristics of assisting in using the single-acting oil cylinder, dispersing driving force and reducing the size and gravity of the driving device.

Description

Technical Field

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

[0002] In the freight field, in order to reduce the occupation of transport vehicles, people have invented the use of container transportation, which greatly improves the transport efficiency; in order to more conveniently realize the cargo transportation, especially the unloading problem during the transportation of bulk cargo, people have invented a freight container with a self-unloading function, abbreviated as a self-unloading freight container, which further improves the efficiency of bulk cargo transportation, reduces the labor intensity of unloading, and reduces the unloading time; on the other hand, in order to standardize the varieties and specifications of freight vehicles in our country, corresponding specifications have been made for the vehicles engaged in freight 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 business; therefore, people have developed a variety of freight containers that meet the national standards and have a self-unloading function, generally including side-turning self-unloading containers, backward-tipping freight containers, and crawler-type flat-pushing freight containers; most of the existing crawler-type flat-pushing freight containers are fixed with a 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. When the rear door is opened, the goods are unloaded from the rear door along with the movement of the cargo push plate to achieve the unloading function; most of its power is driven by a hydraulic motor to drive a roller, the roller drives the crawler, and drives the push plate to achieve 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 achieve unloading; the following defects have been 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 driven by a single cylinder. This kind of cylinder is large in volume and too long in 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 of this weight, the towing vehicle does a lot of useless work during cargo transportation, wasting energy; and the developed one driven by two cylinders uses a double-acting cylinder. The cost of the cylinder is high, the control is complex, it is easy to generate faults, and it will cause uneven driving force of the two cylinders, resulting in uneven force on the moving parts and serious wear. Seriously, it will cause unloading obstruction. 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 that is driven by multiple oil cylinders (thus reducing the weight and manufacturing cost of the oil cylinders) and can drive evenly. The specific technical solution is a driving device for a self-unloading freight box, which is characterized in that: the driving device is installed on a hydraulically driven crawler-type self-unloading freight box, and 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 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 members 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 form a box volume cavity together with the push plate, the rear door, the crawlers and the left side wall; 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 form a loading volume cavity of this freight box together with the push plate, the right side wall, the crawlers and the rear door.

[0004] The driving device is installed at the bottom of the box frame and under the push plate, and is connected to the push plate through the skeleton on the driving device; the driving device includes a skeleton, a driving oil cylinder, a driving hook and a linkage device; the skeleton is of a frame type and 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 cylinder is installed on the skeleton, is connected to the skeleton and is connected to the hydraulic system; there are multiple driving oil cylinders, which are single-acting hydraulic cylinders (thus reducing the weight of the oil cylinders and dispersing the driving force to improve the driving stability and softness), arranged in groups, and the number of groups is arranged in pairs and symmetrically along the movement center line of the skeleton, and the number 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 hook is installed on the oil cylinder, is connected to the oil cylinder body or the piston rod of the oil cylinder, and intermittently hooks or disengages from the bottom longitudinal beam to realize the driving or return stroke of the oil cylinder; the linkage device is installed on the skeleton, is fixedly connected to the skeleton, and its moving parts are respectively connected to the two (groups) of paired oil cylinders.

[0005] The bottom cross beams are installed at the bottom of the box frame, there are multiple of them, arranged horizontally in parallel, and the two ends are respectively connected to the bottom longitudinal beams and / or the side walls of the box frame; the bottom longitudinal beams are installed at the bottom of the box frame, there are more than two of them, arranged longitudinally, and are connected to the bottom cross beams or the side walls of the box frame.

[0006] The described driving hook includes a mounting seat, a side bending plate, a front cylinder shaft, a side bending plate support shaft, a front hook ring, a tension spring, a reversing cylinder, a front hook, a hook shaft, a fixing plate, a fixing shaft, a mounting bracket, a rear hook ring, a rear hook, and a rear cylinder shaft; the mounting seat is mounted on the cylinder block or the piston rod of the driving oil cylinder and is fixedly connected to the cylinder block or the piston rod; the side bending plate is connected to the mounting bracket through the side bending plate support shaft and can swing on the mounting bracket; there are two side bending plates, which are respectively mounted on both sides of the driving oil cylinder; the front cylinder shaft is mounted at the front end of the side bending plate and is sleeved with the front end of the side bending plate; the side bending plate support shaft is mounted on the mounting bracket, and both ends are sleeved and connected to the mounting bracket, can swing on the mounting bracket, passes through the two side bending plates and is fixedly connected to the two side bending plates; the front hook ring is arranged on the upper part of the front hook and is fixedly connected to the front hook; a hole or a boss for connecting with the tension spring is arranged on the front hook ring; the tension spring is mounted between the front cylinder shaft and the front hook, and between the rear cylinder shaft and the rear hook. One end is hooked to the front cylinder shaft, and one end is hooked to the front hook ring. The connection between the rear cylinder shaft and the rear hook is the same; the reversing cylinder is mounted on the mounting seat and is connected to the mounting seat. The piston rod is hinged to the front cylinder shaft or the rear cylinder shaft and is connected to the pneumatic and control system of the whole vehicle. It can drive the side bending plate to swing around the side bending plate support shaft and adjust the force on the front hook and the rear hook through the tension spring, so as to realize the switching of the working states of the front hook and the rear hook; the front hook is mounted on the fixing plate and is connected to the fixing plate through the hook shaft and can swing on the fixing plate; there are two front hooks, which are respectively mounted on both sides of the driving oil cylinder; the hook shaft is mounted on the fixing plate and is connected to the fixing plate. There are multiple hook shafts, and the number is the same as the number of hooks, and they are sleeved with the front hook or the rear hook to ensure that the front hook or the rear hook can swing on the fixing plate; the fixing plate is mounted on the fixing shaft and is fixedly connected to the fixing shaft; there are two fixing plates, which are respectively mounted on both sides of the driving oil cylinder and are fixedly connected to the mounting seat through the fixing shaft; the fixing shaft is mounted on the mounting seat and is fixedly connected to the mounting seat; there are two fixing shafts, which are respectively located on both sides of the driving oil cylinder; the mounting bracket is mounted on the fixing plate and is fixedly connected to the fixing plate; the rear hook ring is arranged on the rear hook and is connected to the rear hook; the rear hook is mounted at the rear end of the fixing plate and is connected to the fixing plate through the hook shaft and can swing on the fixing plate; the rear cylinder shaft is mounted at the rear end of the side bending plate and is sleeved with the rear ends of the two side bending plates.

[0007] Further, the front lower part of the end of the front hook and the rear hook has a transition bevel or an arc.

[0008] Further, the inner cavity of the hook of the front hook and the rear hook is a curved structure.

[0009] Furthermore, force-bearing rods with cross-sections conforming to the inner cavity shape of the hook part of the hook are installed on the front and back sides of the bottom cross beam.

[0010] Furthermore, the push plate is installed obliquely, that is, the upper part of the push plate is forward and the lower part is backward.

[0011] In this article, direction indicators such as front, back, left, right, up, and down are referenced in sequence with the forward direction when the vehicle is moving forward as the front.

[0012] Beneficial effects

[0013] The beneficial 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 soft driving force. Description of the drawings

[0014] Figure 1 is a schematic diagram of the external structure of the dump freight box of the present invention

[0015] Figure 2 is a schematic diagram of the structure of the freight box with part of the front baffle removed of the present invention

[0016] Figure 3 is a schematic diagram of the bottom structure of the present invention

[0017] Figure 4 is a schematic diagram of the structure of an embodiment of the driving device of the present invention

[0018] Figure 5 is a partial schematic diagram of the driving hook without the rear cylinder shaft

[0019] Figure 6 is a schematic diagram of another perspective of the driving hook

[0020] 1. Box frame, 2. Push plate, 3. Right side wall, 4. Crawler, 5. Rear door, 6. Left side wall, 7. Driving device, 8. Bottom cross beam, 9. Bottom longitudinal beam, 10. Crawler 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 bracket, 710. Steel wire rope, 81. Force-bearing rod, 741. Mounting seat, 742. Reversing cylinder, 751. Side bending plate, 752. Front cylinder shaft, 753. Side bending plate support shaft, 754. Front hook pull ring, 755. Front hook, 756. Hook shaft, 757. Fixed plate, 758. Fixed shaft, 759. Rear hook, 760. Rear hook pull ring, 761. Rear cylinder shaft, 762. Mounting bracket. Detailed implementation manners

[0021] To better illustrate the technical solution of the present invention, the specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings, such as Figures 1-6, in this example, the selected driving hook includes a mounting base 741, a side bending plate 751, a front cylinder shaft 752, a side bending plate support shaft 753, a front hook pull ring 754, a tension spring, a reversing cylinder 742, a front hook 755, a hook shaft 756, a fixing plate 757, a fixing shaft 758, a mounting bracket 762, a rear hook pull ring 760, a rear hook 759, and a rear cylinder shaft 761; in this example, a cylindrical mounting base is selected as the mounting base 741, and the mounting base 741 is installed on the cylinder block of the driving oil cylinder 74 and fixedly connected to the cylinder block; the side bending plate 751 is connected to the mounting bracket 762 through the side bending plate support shaft 753 and can swing on the mounting bracket 762. That is to say, whether the side bending plate support shaft 753 rotates or the two side bending plates 751 rotate on the side bending plate support shaft 753, as long as the swing of the side bending plate 751 can be realized; two side bending plates 751 are selected and installed on both sides of the driving oil cylinder respectively; the front cylinder shaft 752 is installed at the front end of the side bending plate 751 and sleeved on the front end of the side bending plate 751; the side bending plate support shaft 753 is installed on the mounting bracket 762, and both ends are sleeved and connected to the mounting bracket 762, and can swing on the mounting bracket 762, and passes through the two side bending plates 751 and is fixedly connected to the two side bending plates 751. This is also an installation method of the aforementioned side bending plate support shaft 753; in this example, the front hook pull ring 754 is arranged on the upper part of the front hook 755 and is an integral structure with the front hook 755, which is convenient for manufacturing and reduces production costs; and a hole for hanging the tension spring is arranged on the front hook pull ring 754; in this example, a cylindrical helical tension spring commonly used in this industry is selected as the tension spring, and the tension spring is installed between the front cylinder shaft 752 and the front hook pull ring 754, and between the rear cylinder shaft 761 and the rear hook pull ring 760. One end is hooked to the front cylinder shaft 752, and one end is hooked to the front hook pull ring 754. The connection between the rear cylinder shaft 761 and the rear hook pull ring 760 is the same; in this example, a double-acting micro cylinder commonly used in this industry is selected as the reversing cylinder 742 of this example. The reversing cylinder 742 is installed on the mounting base 741 and connected to the mounting base 741. The piston rod of the reversing cylinder is hinged to the front cylinder shaft 752 or the rear cylinder shaft 761 and connected to the pneumatic and control system of the whole vehicle, and can drive the side bending plate 751 to swing around the side bending plate support shaft 753, and through the tension spring, adjust the pulling force of the tension spring on the front hook 755 and the rear hook 759, so as to realize the working state switching of the front hook 755 and the rear hook 759, that is, to lift upward and disengage from the bottom cross beam 8, or to droop and hook the bottom cross beam 8; in this example, flat-type hooks commonly used in this industry are selected as the front hook 755 and the rear hook 759, and an arc-shaped transition inclined surface is arranged at the front lower part of the outside of the hook; the front hook 755 is installed on the fixing plate 757 and connected to the fixing plate 757 through the hook shaft 756 and can swing on the fixing plate 757; there are two front hooks 755, which are installed on both sides of the driving oil cylinder 74 respectively;Install the hook shaft 756 on the fixed plate 757 and connect it to the fixed plate 757. There are 4 in total on both sides, and they are sleeved with the front hook 755 or the rear hook 759 to ensure that the front hook 755 or the rear hook 759 can swing around the hook shaft 756 on the fixed plate 757; install the fixed plate 757 on the fixed shaft 758 and fixedly connect it to the fixed shaft 758; there are two fixed plates 757, which are respectively installed on both sides of the driving oil cylinder 74 and fixedly connected to the mounting seat 741 through the fixed shaft 758; install the fixed shaft 758 on the mounting seat 741 and fixedly connect it to the mounting seat 741; there are two fixed shafts 758, which are respectively located on both sides of the driving oil cylinder 74; install the mounting bracket 762 on the fixed plate 757 and fixedly connect it to the fixed plate 757; set the rear hook pull ring 760 on the rear hook 759 and integrate it with the rear hook 759; install the rear hook 759 at the rear end of the fixed plate 757 and connect it to the fixed plate 757 through the hook shaft 756, and it can swing around the fixed shaft 756 on the fixed plate 757; install the rear cylinder shaft 761 at the rear end of the side bending plate 751 and sleeve it with the rear ends of the two side bending plates 751. In this way, the implementation of the driving hook is completed.;

[0022] 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 commonly used 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 into a freight container according to the commonly used assembly method in this industry; in this example, the 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 commonly used 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 commonly used self-unloading freight container in this industry; in this example, 4 driving oil cylinders are selected, divided into two groups, both of which are single-acting hydraulic cylinders, which can reduce the weight and volume of the oil cylinders, disperse the driving force, and thus improve 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, the end of the piston rod of the oil cylinder is fixedly hinged 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, so as to drive the skeleton 71 to move at the bottom of the frame 1, and then drive 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 the oil cylinder body to the skeleton 71 and install the driving hook on the piston rod, which can also achieve the above functions, but it depends on the installation position and overall layout flexibly; in this example, a commonly used ratchet-type hook in this industry is selected as the driving hook. In this example, according to the aforementioned piston rod fixing mode, the driving hook is selected and installed on the oil cylinder body, connected to the oil cylinder body, and can intermittently hook or disengage from the bottom cross beam 8 to achieve the driving or return 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 pieces; a steel wire rope connecting piece commonly used in this industry is selected as the connecting piece in this example, the connecting piece 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 pieces, thus completing the implementation of the present invention; because the single-acting oil cylinder is simpler in structure, smaller in volume and lighter in 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 stress 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.;

[0023] During application, when the freight container is empty or in transit, the drive device 7 is in its original position and the push plate 2 is at the front end of the container frame 1; when the freight container carrying goods arrives at the unloading destination, the rear door 5 is opened and the rear door 5 freely hangs on the rear upper crossbeam of the container frame 2; the drive device 7 is started, and a group of drive cylinders, such as the inner left drive cylinder 74 and the inner right drive cylinder installed inside, start to inject oil, and the piston rods extend outwards. At this time, the control system commands the reversing cylinder 742 installed on the drive cylinder to start, pushing the front cylinder shaft 752 and driving the front end of the side bending plate 751 to move upwards. Through the tension spring, the front hook 755 is pulled to swing upwards around the hook shaft 756 and disengages from the bottom crossbeam 8. At this time, the tension spring on the rear cylinder shaft 761 is released, and the spring force of the tension spring pulling the rear hook 759 decreases. Depending on the gravity of the rear hook 759, the end of the rear hook 759 sinks and is hooked to the bottom crossbeam 8. For reliable force application, in this example, a force-bearing rod 81 is also provided, and the rear hook 759 is coupled with the force-bearing rod 81. The force of the piston movement of the drive cylinder is transmitted to the bottom crossbeam 8 through the rear hook 759. Since the bottom crossbeam 8 is fixedly connected to the container frame 1, the reaction force pushes the drive cylinder and then pushes the framework 71 to move in the reverse direction, and then pushes the push plate 2 to move, realizing vehicle unloading or return journey. During the return journey, the control system commands the reversing cylinder 742 to move in the reverse direction, realizing the function of the rear hook 759 disengaging and the front hook 755 being hooked to the other side of the bottom crossbeam 8; the inner left drive hook 75 and the inner right drive hook 76 installed on the inner left drive cylinder 74 and the inner right drive cylinder are in a state of being hooked to the bottom crossbeam 8, while the drive hooks installed on the other group of drive cylinders, that is, the outer left drive cylinder 72 and the outer right drive cylinder 77, are in a state of disengaging from the bottom crossbeam 8; when the piston rods of the inner drive cylinders extend, they drive the framework 71 to move on the bottom longitudinal beam 9. When the piston rods of the inner drive cylinders extend to the limit position, the sensor installed on the framework either sends a signal or directly commands the control system to stop supplying oil to the two inner drive cylinders and switch to supplying oil to the two outer drive cylinders. At this time, the piston rods of the outer drive cylinders extend outwards, and the drive hooks installed on the outer drive cylinders are hooked to the bottom crossbeam, while the drive hooks on the inner drive cylinders are disengaged from the bottom crossbeam. The outer drive cylinders drive the framework 71 to continue moving in the same direction at the end position of the inner drive cylinders; due to the action of the linkage device, when the piston rods of the outer drive cylinders extend, the distance between the cylinder body and the end of the piston rod, that is, the end of the framework 71 connected to the piston rod, increases, and at the same time, the end of the traction steel wire rope 710 connected to the outer drive cylinder elongates. Since the steel wire rope 710 is inelastic, the end of the steel wire rope 710 connected to the inner drive cylinder pulls the cylinder body of the inner drive cylinder towards the end of the framework 71 connected to the piston rod, that is, compresses the piston rod of the inner drive cylinder to retract, providing the basic condition for the next cycle of oil injection;In this way, the reciprocating rotation realizes the step motion of the push plate 2 until the loaded goods are completely unloaded. The control system will drive the hook to work in the reverse direction, that is to say, the driving hook is bidirectional. When the hook works in the reverse direction, the oil cylinder can move in the reverse direction until the driving device 7 returns to the initial position and locks the rear door 5, then a unloading process is completed. It should be noted that the crawler is made of a flexible conveyor belt commonly used in this industry. One end is fixedly connected to the push plate 2, and the other end is laid flat on the bottom of the box frame 1 and then bypasses from below the bottom of the box frame 1 and returns to be connected to the front end of the framework 71 to form a loop. In this way, every time the driving device 7 moves, the crawler 4 moves synchronously and enclosedly, so that the goods will not leak.

Claims

1. A driving device for a self-unloading freight box, characterized in that: The described driving device is installed on a hydraulic-driven crawler-type self-unloading freight box, and the self-unloading freight box includes a box frame, a push plate, a right side wall, crawlers, a rear door, a left side wall, bottom cross beams, and bottom longitudinal beams; the driving device is installed at the bottom of the box frame, below the push plate, and is connected to the push plate through the skeleton on the driving device; the driving device includes a skeleton, a driving oil cylinder, driving hooks, and a linkage device; the bottom cross beams are 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 beams and / or the side walls of the box frame; the bottom longitudinal beams are installed at the bottom of the box frame, there are more than two, arranged longitudinally, and are connected to the bottom cross beams or the side walls of the box frame; the driving hooks include a mounting seat, a bent side plate, a front cylinder shaft, a bent side plate support shaft, a front hook pull ring, a tension spring, a reversing cylinder, a front hook, a hook shaft, a fixing plate, a fixing shaft, a mounting bracket, a rear hook pull ring, a rear hook, and a rear cylinder shaft; the mounting seat is installed on the cylinder body or the piston rod of the driving oil cylinder, and is fixedly connected to the cylinder body or the piston rod; the bent side plate is connected to the mounting bracket through the bent side plate support shaft and can swing on the mounting bracket; there are two bent side plates, respectively installed on both sides of the driving oil cylinder; the front cylinder shaft is installed at the front end of the bent side plate and is sleeved with the front end of the bent side plate; the bent side plate support shaft is installed on the mounting bracket, and both ends are sleeved and connected to the mounting bracket, can swing on the mounting bracket, passes through the two bent side plates and is fixedly connected to the two bent side plates; the front hook pull ring is arranged on the upper part of the front hook and is fixedly connected to the front hook; a hole or a boss for connecting with the tension spring is arranged on the front hook pull ring; the tension spring is installed between the front cylinder shaft and the front hook, and between the rear cylinder shaft and the rear hook, one end is hooked to the front cylinder shaft, one end is hooked to the front hook pull ring, and the connection between the rear cylinder shaft and the rear hook is the same; the reversing cylinder is installed on the mounting seat and is connected to the mounting seat, the piston rod is hinged to the front cylinder shaft or the rear cylinder shaft, and is connected to the pneumatic and control system of the whole vehicle, can drive the bent side plate to swing around the bent side plate support shaft, and adjust the force on the front hook and the rear hook through the tension spring, so as to realize the working state switching of the front hook and the rear hook; the front hook is installed on the fixing plate and is connected to the fixing plate through the hook shaft and can swing on the fixing plate; there are two front hooks, respectively installed on both sides of the driving oil cylinder; the hook shafts are installed on the fixing plate and are connected to the fixing plate, there are multiple ones, the number of which is the same as the number of hooks, and are sleeved with the front hook or the rear hook to ensure that the front hook or the rear hook can swing on the fixing plate; the fixing plate is installed on the fixing shaft and is fixedly connected to the fixing shaft; there are two fixing plates, respectively installed on both sides of the driving oil cylinder, and are fixedly connected to the mounting seat through the fixing shaft; the fixing shaft is installed on the mounting seat and is fixedly connected to the mounting seat; there are two fixing shafts, respectively located on both sides of the driving oil cylinder; the mounting bracket is installed on the fixing plate and is fixedly connected to the fixing plate; the rear hook pull ring is arranged on the rear hook and is connected to the rear hook;The rear hook described above is installed at the rear end of the fixed plate and is connected to the fixed plate through a hook shaft, enabling it to swing on the fixed plate; the rear cylinder shaft is installed at the rear end of the side bending plate and is sleeved with the rear ends of the two side bending plates.

2. The drive device of a self-unloading freight box according to claim 1, characterized in that: The front lower part of the front hook and the rear hook end has an excessive bevel or arc.

3. The drive device of a dump freight box according to claim 1, characterized in that: The inner cavity of the hook of the front hook and the rear hook is a curved structure.

4. The drive device of a self-tipping freight container according to claim 1, characterized in that: Force-bearing rods with cross-sections fitting the shape of the inner cavity of the hook part are installed on the front and rear surfaces of the bottom cross beam.

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