A retractable weighing and baling machine

Abstract

This utility model discloses a retractable weighing and baling machine, relating to the field of metering and packaging technology for leafy plants. It includes a chassis assembly, a pressure head assembly, a weighing assembly, a hydraulic assembly, an electrical control assembly, and a moving assembly. The hydraulic assembly includes a hydraulic workstation, a hydraulic control mechanism, and a hydraulic actuator. The hydraulic control mechanism includes an electromagnetic directional valve, a synchronous motor, and a three-way valve. The hydraulic actuator includes two sets of left and right hydraulic actuators, respectively arranged on both sides of the chassis assembly. It features small size, light weight, accurate weighing, ease of use, and good safety. It can be used for weighing, compressing, and baling tobacco leaves, as well as for weighing, compressing, and baling leafy and stem agricultural products such as rice straw, wheat straw, and kelp.

Description

Technical Field

[0001] This utility model relates to the field of measurement and packaging technology for leafy plants, and in particular to a retractable weighing and packaging machine. Background Technology

[0002] Leafy agricultural products, such as tobacco leaves and kelp, are bulky and loose, so after being purchased from production bases, they usually need to be weighed, packaged, and then transported to processing plants for storage.

[0003] In existing technologies, the compression components of equipment used for weighing and packaging leafy plants are mostly located at the top, which greatly increases the overall height of the machine, occupies a large amount of space, and makes the maintenance of the equipment extremely inconvenient.

[0004] In recent years, some dual-cylinder weighing and packaging equipment has emerged. Although it reduces the overall height of the machine, it is difficult to ensure that the hydraulic oil flow to the two cylinders is completely equal because it adjusts the hydraulic oil flow of the two cylinders through flow lock valves or flow divider and combiner valves. Therefore, it is still difficult to ensure synchronization of the dual-cylinder compression, which makes the stability of the compression process relatively poor.

[0005] Chinese Patent (202422370722.8) discloses a "Tobacco Leaf Baling Machine," which includes a machine body with a compression chamber inside. A vertically movable pressure frame is installed within the compression chamber. An upper opening is provided at the upper end of the compression chamber. Door grooves are provided at both the front and rear ends of the compression chamber. First anti-pressure detection devices are provided on both sides of the upper opening, and a second anti-pressure detection device is provided within the door groove. This tobacco leaf baling machine can detect foreign objects at the upper opening using the first anti-pressure detection device, thus stopping the pressure frame's movement and preventing the operator's hand or other foreign objects from being pressed into the compression chamber by the pressure frame if they are located at the edge of the upper opening. Furthermore, if the second anti-pressure detection device in the door groove detects that the door panel is open while the pressure frame is compressing the tobacco leaves, it can promptly stop the pressure frame's movement, preventing the tobacco leaves from scattering outside the equipment. Overall safety is improved, reducing machine safety hazards while increasing tobacco leaf baling efficiency.

[0006] Another Chinese patent (202420790070.0) discloses a "self-weighing double-cylinder hydraulic tobacco baler," which includes a low base. A left side box is located on the left end of the upper surface of the low base, a lower support plate is located in the middle, and a right side box is located on the right end. A weighing instrument is installed on the lower surface of the low base and connected to the wheels. Upper and lower sealing doors are rotatably connected to the front and rear sides of the left side box. The other side of the upper sealing door is connected to the right side box via an upper locking device, and the other side of the lower sealing door is connected to the right side box via a lower locking device. A left hydraulic cylinder is installed inside the left side box, and a right hydraulic cylinder is installed inside the right side box. Connecting plates are installed at the ends of the guide rods of the left and right hydraulic cylinders, and upper pressure blocks are installed on the connecting plates. A hydraulic oil tank is located at the bottom of the left side box, and a hydraulic motor and a solenoid valve are installed on the hydraulic oil tank. The hydraulic motor drives a hydraulic pump, which is hydraulically connected to the solenoid valve. The solenoid valve is hydraulically connected to the left and right hydraulic cylinders. A weight display screen and an electrical box are installed on the upper part of the left side box. This machine is low in cost, easy to move, and has a securely locked sealing door.

[0007] Another Chinese patent (202321737473.0) discloses a "Tobacco Leaf Baling Machine with a Dust Removal Device," which includes: a shell, comprising a top wall, side walls, and a bottom wall, the top wall having a pressure head opening; a hydraulic device, comprising a hydraulic oil tank located within the space enclosed by the shell, a hydraulic pump located on one side of the hydraulic oil tank and connected to the hydraulic oil tank, and a lifting cylinder connected to the hydraulic pump; a tobacco leaf pressing device, comprising a lifting plate that moves up and down under the drive of the lifting cylinder and a pressure head fixed to the lower surface of the lifting plate; a pressure-resistant device, located within the space enclosed by the shell and fixed to the bottom wall of the shell, the pressure-resistant device and the pressure head of the tobacco leaf pressing device forming a space for compressing the tobacco leaves; and a dust removal device, located within the space enclosed by the shell to discharge dust inside the shell to the outside of the shell. This utility model of a tobacco leaf baling machine can overcome the problems of dust accumulation, motor overheating, short circuits, and significant fire risks in existing tobacco leaf baling machines.

[0008] Chinese Patent (202221200871.4) discloses a tobacco baling machine with a safety detection mechanism, which includes a housing, a hydraulic cylinder, a fixing plate, a lower pressure platform, and a detection and protection mechanism. The housing is a rectangular cavity structure with an opening at the top and one end. A hydraulic cylinder is installed at the top of the housing, and a fixing plate and a lower pressure platform are installed on the hydraulic cylinder. A detection and protection mechanism is installed at one end of the housing opening. The detection and protection mechanism includes a first protective door, a second protective door, a locking group, sensor probes, and a control box. The first and second protective doors are both located at the opening of the housing. Several sensor probes are installed inside the opening. A control box is located at one end of the housing, and an alarm and an alarm light are installed on one side of the control box. This utility model is intended to solve the safety hazards existing in the use of existing baling machines.

[0009] Another Chinese patent (202020596011.1) discloses a tobacco leaf baling machine for safe production, which includes a baling machine body and a controller located in the electrical cabinet of the baling machine. The controller includes a start switch, which comprises a first switch and a second switch. The first switch is located on one side of the baling machine, and the second switch is located on the other side of the baling machine opposite to the first switch. The first switch and the second switch are connected in series, and the series circuit of the first switch and the second switch is connected to the input terminal of the controller. The output terminal of the controller is connected to the input terminal of the hydraulic cylinder start circuit. This utility model makes simple modifications to the original baling machine equipment, with low equipment requirements and low cost. By having workers on both sides of the baling machine start the switches simultaneously, it avoids blind spots formed after tobacco leaves are piled up in the baling area of ​​the baling machine, thus preventing safety accidents.

[0010] Another Chinese patent (201921693795.3) discloses a novel tobacco baling machine, which includes a housing with a tobacco chamber inside. Support rods are fixedly installed on both sides of the bottom of the tobacco chamber, and a base plate is located between the two support rods. Rotating shafts are fixedly installed on both ends of the base plate. A rotating groove is formed near the top of each support rod, and the rotating shaft is movably fitted into the rotating groove. An upper limit plate is fixedly installed on the outer surface of the rotating shaft. This novel tobacco baling machine places the tobacco leaves to be baled on the base plate, with support rods movably connected to both ends of the base plate. Weighing sensors are installed at the bottom ends of the two support rods. Before baling the tobacco leaves, the weighing sensors transmit the measured weight to a display. If the weight exceeds the maximum load capacity, a signal is transmitted to an overload alarm device, which issues an alarm to alert the worker, thus achieving the advantage of having a weighing function.

[0011] Another patent, Chinese Patent (201921331547.4), discloses an "Improved Tobacco Packing Machine for Sterilizing Tobacco Leaves Targeting Broad-Spectrum Soil-borne Pathogens." This machine includes a concave body with opening and closing doors on the front and rear sides of the groove. Two vertical sections of the body each contain a hydraulic cylinder, with piston rods extending from the top of the vertical sections. The tops of the two piston rods are connected by a connecting rod. A pressure plate is fixedly connected to the lower middle section of the connecting rod via a connecting block. The connecting block is an isosceles trapezoid in its longitudinal cross-section in the left-right direction, with its short side fixed to the connecting rod and its long side fixed to the top surface of the pressure plate. A pad is detachably fixed to the lower side of the pressure plate. The pad's cross-sectional shape and size are identical to the pressure plate. The pad is composed of multiple pad units stacked together, and these units are detachably connected. This packing machine can pack tobacco bales of different weights and sizes, all with relatively small volumes.

[0012] Another patent, Chinese Patent (201920415549.5), discloses a "Safety Anti-Pressure Device for a Mobile Tobacco Baler," which includes a photoelectric sensor detection device. This device comprises a photoelectric sensor switch and a control relay. The photoelectric sensor switch is located on the inner side of the tobacco baler at the top-opening door. The photoelectric sensor switch and the control relay are electrically connected, and the control relay is electrically connected to the tobacco baler controller. This utility model has a simple structure, employing both a photoelectric sensor door controller and an infrared sensor probe for detection. This effectively prevents foreign objects from accidentally entering the machine and causing safety accidents, ensuring the safety of operators. Simultaneously, it does not alter the original appearance design of existing electric balers, reducing manufacturing costs and providing high anti-pressure sensitivity.

[0013] Another patent, Chinese Patent (201820284048.3), discloses an "intelligent tobacco baling machine," which includes a frame with a movable pressure head. A camera for capturing images of tobacco leaves is mounted on the pressure head or on the frame to one side of the pressure head. During loading, the camera is activated to record video of the loading process. The video is compressed and stored in a database, and an identification code is created, which is linked to the video and tobacco leaf data. After baling, the identification code is output and associated with the baled tobacco leaves. A remote terminal retrieves the relevant video data through the identification code, facilitating quality traceability in subsequent processes. Through these steps, tobacco quality traceability is achieved using the intelligent tobacco baling machine. This allows for control of tobacco leaf acquisition quality at the source tobacco station, further improving the quality of the final product.

[0014] Another patent, Chinese Patent (201810169178.7), discloses an "Intelligent Tobacco Baling Machine and Quality Traceability Method," which includes a frame with a movable pressure head. A camera for capturing images of tobacco leaves is mounted on the pressure head or on the frame to one side of the pressure head. During loading, the camera is activated to record video of the tobacco leaf loading process. The video is compressed and stored in a database, and an identification code is created, which is then linked to the video and tobacco leaf data. After baling, the identification code is output and associated with the baled tobacco leaves. A remote terminal retrieves and obtains the relevant video data through the identification code, facilitating quality traceability in subsequent processes. Through these steps, tobacco leaf quality traceability is achieved using an intelligent tobacco baling machine. This allows for control of tobacco leaf acquisition quality at the source tobacco station, further improving the quality of the final product. Summary of the Invention

[0015] The technical problem to be solved by this utility model is to provide a weighing and packaging equipment that is small in size, light in weight, accurate in weighing, convenient to use, and safe.

[0016] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is to design a retractable weighing and baling machine: including a chassis assembly, a pressure head assembly, a weighing assembly, a hydraulic assembly, an electrical control assembly, and a moving assembly; the pressure head assembly is located in the upper middle part of the chassis assembly, and the weighing assembly and the moving assembly are arranged sequentially from top to bottom in the lower part of the chassis assembly; the signal line of the weighing assembly is connected to the electrical control assembly, and the electrical control assembly is located on one side of the chassis assembly, and its control line is connected to the hydraulic assembly; The hydraulic assembly includes a hydraulic workstation, a hydraulic control mechanism, and a hydraulic actuator. The hydraulic control mechanism includes a solenoid directional valve, a synchronous motor, and a three-way valve. The solenoid directional valve is located in the hydraulic workstation, with one end connected to the hydraulic workstation and the other end splitting into two paths: one path connects to the synchronous motor, and the other path connects to the three-way valve. The synchronous motor and the three-way valve are respectively located in the front and rear middle sections of the lower part of the chassis assembly. The other ends of the synchronous motor and the three-way valve each have two branches, which are respectively connected to the input and output ends of the left and right hydraulic actuators. The hydraulic workstation is located on the lower part of one side of the chassis assembly, the hydraulic control mechanism is located on the lower part of the chassis assembly, and the hydraulic actuator includes two sets of left and right hydraulic actuators, which are respectively located on both sides of the chassis assembly.

[0017] The chassis assembly includes a chassis frame, a base frame, front and rear upper side doors, front and rear lower side doors, outer side panels, and inner lining panels. The chassis frame divides two left and right hydraulic actuator cavities, a compression and packaging cavity, an electronic control component cavity, and a hydraulic workstation cavity. The compression and packaging cavity is located between the two left and right hydraulic actuator cavities. The electronic control component cavity and the hydraulic workstation cavity are respectively located on the upper and lower parts of one side of the left and right hydraulic actuator cavity. The outer side panels cover the outside of the left and right hydraulic actuator cavity, the electronic control component cavity, and the hydraulic workstation cavity. The inner lining panels cover the left and right sides and the bottom of the compression and packaging cavity. One side of the front and rear upper side doors and the front and rear lower side doors are respectively hinged to one side of the upper and lower parts of the front and rear sides of the compression and packaging cavity, and the other side is respectively equipped with an automatic locking buckle for a dump truck.

[0018] The front and rear upper side doors and the front and rear lower side doors are composed of a tubular frame and an inner lining plate, with the inner lining plate covering the inner side of the tubular frame.

[0019] The hydraulic actuator includes two left and right hydraulic actuators, each of which includes a left and right hydraulic cylinder, a left and right hydraulic cylinder shaft, a left and right hydraulic cylinder seat, a left and right hydraulic cylinder input pipe, a left and right hydraulic cylinder input port, a left and right hydraulic cylinder output port, and a left and right hydraulic cylinder seat support plate. The left and right hydraulic cylinder support plates are mounted on the base frame, and the left and right hydraulic cylinder seats at the lower part of the left and right hydraulic cylinders are mounted on them. The left and right hydraulic cylinders extend axially from the upper end of the left and right hydraulic cylinders and are connected to the pressure head assembly. The upper end of the left and right hydraulic cylinder input pipe is connected to the upper inner cavity of the left and right hydraulic cylinders, and its lower end extends downward to the lower part of the left and right hydraulic cylinders, becoming the input port of the left and right hydraulic cylinders. One of the two branches at the other end of the synchronous motor is connected to the input port of the left and right hydraulic cylinders. The output port of the left and right hydraulic cylinders is located at the lower part of the left and right hydraulic cylinders and is connected to one of the two branches at the other end of the three-way valve.

[0020] The pressure head assembly includes a compression beam, two left and right frames, a bottom frame, an outer pressure head plate, a pressure plate, and a grooved pressure plate. The left and right frames are in the shape of isosceles triangles, and the bottom frame is rectangular. The bottom edges of the left and right frames are connected to the left and right sides of the bottom frame, and their upper ends are connected to the compression beam. The outer pressure head plates cover the bottom surface of the bottom frame, the area between its bottom edge and the compression beam, and the outer surfaces of the left and right frames. The pressure plate is located below the bottom frame, and a grooved pressure plate is located below it.

[0021] Reinforcing support columns are also provided between the bottom surfaces of the front and rear sides of the base frame and the compression beam.

[0022] The reinforcing support column can be a single column or two columns arranged in an "X" shape.

[0023] A pressure equalization plate is also provided between the pressure plate and the grooved pressure plate.

[0024] The weighing assembly includes a pair of directional wheel sensors and a universal wheel sensor. The pair of directional wheel sensors are respectively located at the front and rear of the lower left side of the base frame, and the universal wheel sensor is located at the middle of the lower right side of the base frame.

[0025] The moving component includes a pair of directional wheels and a universal wheel component. The universal wheel component includes a universal wheel extension plate and a pair of universal wheels. The pair of directional wheels are respectively disposed below a pair of directional wheel sensors. The upper center of the universal wheel extension plate is disposed below the universal wheel sensors, and the pair of universal wheels are respectively disposed on the front and rear sides below the universal wheel extension plate.

[0026] A stop limit switch component is also provided on the top of the electronic control assembly. The stop limit switch component includes a stop plate, a stop limit switch and a stop limit switch mounting block. The stop plate is located at one end of the compression beam, the stop limit switch mounting block is located on the top of the electronic control assembly, and the stop limit switch is located on the stop limit switch mounting block and below the stop plate.

[0027] The electrical control assembly includes an electrical control box, an electrical control box door, a display screen, a start / stop switch, an electrical control box door lock, a controller, a time relay, an AC contactor, and an alarm device. The electrical control box door is hinged to one side of the opening of the electrical control box, and the display screen, start / stop switch, electrical control box door lock, and alarm device are installed on it. The controller, time relay, and AC contactor are located inside the cavity of the electrical control box.

[0028] This utility model's retractable weighing and baling machine adopts a retractable, dual-compression cylinder design, resulting in a lower overall height, smaller size, and lighter weight, thus lower cost. Furthermore, it utilizes the principle of three-point surface measurement, employing three weighing sensors to ensure that each sensor is always under load, leading to high weighing accuracy. More importantly, it combines a synchronous motor with a three-way valve to precisely and automatically adjust the contraction pressure of the dual compression cylinders, maximizing pressure balance and ensuring operational stability. Additionally, it uses an automatic locking mechanism from a self-unloading trailer to lock and open the side door of the container, facilitating operation and enhancing safety during use. Attached Figure Description

[0029] Figure 1 This is a front view schematic diagram of this utility model; Figure 2 This is a schematic diagram of the main sectional view of this utility model; Figure 3 This is a right-side sectional view of the present invention along the A-A axis; Figure 4 This is a top sectional view of the present invention along the B-B axis; Figure 5 This is a top sectional view of the present invention along the C-C axis; Figure 6 This is a partially enlarged schematic diagram of K in this utility model; Figure 7 This is a partially enlarged schematic diagram of the S-shaped part of this utility model.

[0030] In the diagram: 1 is the directional wheel, 2 is the directional wheel sensor, 3 is the grooved bottom plate, 4 is the hinge, 5 is the front and rear lower side doors, 6 is the front and rear upper side doors, 7 is the left and right hydraulic cylinder input pipe, 8 is the left and right hydraulic cylinders, 9 is the left and right hydraulic cylinder shaft, 10 is the left and right hydraulic cylinder shaft end fastener, 11 is the compression beam, 12 is the outer side plate of the pressure head, 13 is the electrical control box door, 14 is the stop plate, 15 is the stop limit switch, 16 is the stop limit switch mounting block, 17 is the display screen, 18 is the electrical control box body, 19 is the automatic locking buckle of the dump trailer, 20 is the hydraulic workstation, 21 is the universal wheel sensor, 22 is the universal wheel extension plate, 23 is the universal wheel, 24 is the inner lining plate, 25 is the outer side plate, 26 is the grooved pressure plate, 27 is the pressure equalization plate, and 28 is the rear reinforcement brace. Column 29 is the left and right frame, 30 is the pressure plate, 31 is the base frame, 32 is the left and right hydraulic cylinder seat support plate, 33 is the left and right hydraulic cylinder seat, 34 is the left and right hydraulic cylinder output port, 35 is the left and right hydraulic cylinder input port, 36 is the universal wheel sensor support beam, 37 is the three-way valve, 38 is the front reinforcing support column, 39 is the bottom frame, 40 is the synchronous motor support plate, 41 is the synchronous motor, 42 is the three-way valve support plate, 43 is the synchronous motor input pipe, 44 is the synchronous motor left end output pipe, 45 is the directional wheel sensor support beam, 46 is the three-way valve left end output pipe, 47 is the three-way valve input pipe, 48 is the three-way valve right end output pipe, 49 is the right hydraulic cylinder support beam, 50 is the middle main support beam of the base frame, and 51 is the synchronous motor right end output pipe. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. The following description is by way of example, but the scope of protection of the present invention should not be limited thereto.

[0032] The orientations described in this specification and in the accompanying drawings are as follows: Figure 1-2 and Figure 6-7 The front is the actual front, the inside is the actual back; the top is the actual top, the bottom is the actual bottom; the left and right are the actual left and right respectively. Figure 3 The front is the actual right side, the inside is the actual left side; the right side is the actual back, the left side is the actual front; the top and bottom are the actual top and bottom respectively. Figure 4-5 The front is the actual top, the inside is the actual bottom; the top is the actual back, the bottom is the actual front; the left and right are the actual left and right sides respectively.

[0033] Example: The retractable weighing and baling machine of this embodiment consists of a chassis assembly, a pressure head assembly, a weighing assembly, a hydraulic assembly, an electrical control assembly, a moving assembly, and a stop limit switch component. The pressure head assembly is located in the upper middle part of the chassis assembly. The weighing assembly and the moving assembly are arranged sequentially from top to bottom in the lower part of the chassis assembly. The signal line of the weighing assembly is connected to the electrical control assembly. The electrical control assembly is located on one side of the chassis assembly, and its control line is connected to the hydraulic assembly. The stop limit switch component is located in the upper part of the electrical control assembly. The hydraulic assembly consists of a hydraulic workstation 20, a hydraulic control mechanism, and a hydraulic actuator. The hydraulic control mechanism consists of an electromagnetic directional valve (not marked in the figure), a synchronous motor 41, and a three-way valve 37. The hydraulic actuator consists of two left and right hydraulic actuator components.

[0034] The chassis assembly consists of a chassis frame, a base frame 31, two front and rear upper side doors 6, two front and rear lower side doors 5, an outer side panel 25, and an inner lining panel 24.

[0035] The enclosure frame is a rectangular prism frame (see attached). Figure 2 As shown in the figure, it is divided into two left and right hydraulic actuator cavities, a compression and packaging cavity, an electrical control component cavity, and a hydraulic workstation cavity.

[0036] The cavities of the two left and right hydraulic actuators are rectangular cavities that are narrower on the left and right and deeper at the front and back.

[0037] The compression and packaging cavity is a rectangular, open-top cavity located between the cavities of two left and right hydraulic actuators. The left and right sides and bottom of the cavity are covered with inner lining plates 24. A grooved bottom plate 3 (composed of multiple wooden planks with grooves between each pair of planks for holding the packing rope) is also provided on the bottom lining plate 24 to receive the packaged material. Two front and rear upper side doors 6 and two front and rear lower side doors 5 are hinged to the left sides of the front and rear sides of the compression and packaging cavity via hinges 4. Door latches (in this example, an automatic locking latch 19 from a dump truck is used to ensure that the latch will not automatically release after locking, achieving a safe operation) are also provided on the right sides of the two front and rear upper side doors 6 and the two front and rear lower side doors 5, as well as on the right sides of the front and rear sides of the compression and packaging cavity.

[0038] The two front and rear upper side doors 6 and the two front and rear lower side doors 5 are all composed of a tubular frame (not marked in the figure) and an inner lining plate 24 covering the inside of it, which ensures that the inner surface is relatively smooth (for easy compression) and also ensures sufficient rigidity and strength to avoid bulging during compression.

[0039] The electrical control component cavity and the hydraulic workstation cavity are respectively located in the upper and lower parts of the right side of the left and right hydraulic actuator cavities on the right side.

[0040] The outer side plate 25 covers the outer side of the cavities of the left and right hydraulic actuators, the cavity of the electrical control components, and the cavity of the hydraulic workstation 20.

[0041] Base frame 31 (see attachment) Figure 5 The structure shown is composed of a base frame side frame (not marked in the figure), two main support beams 50 in the middle of the base frame, an auxiliary beam 45 supporting the directional wheel sensor, an auxiliary beam 49 supporting the right hydraulic cylinder, and an auxiliary beam 36 supporting the universal wheel sensor.

[0042] The base frame side frame (made of channel steel) is rectangular, with two main support beams 50 horizontally positioned on either side of the middle of the base frame. The directional wheel sensor support beam 45 consists of two sections, front and rear, respectively positioned on the front and rear inner sides of the left side of the base frame between the two main support beams 50 and the two base frames, used to support the directional wheel sensor 2. The right hydraulic cylinder support beam 49 also consists of two sections, front and rear, respectively positioned on the front and rear inner sides of the right side of the base frame between the two main support beams 50 and the two base frames, used to support the left and right hydraulic actuators on the right side. The universal wheel sensor support beam 36 is positioned between the two main support beams 50 on the right side of the base frame, used to support the universal wheel sensor 21.

[0043] On the bottom surface of the left front and rear sections of the base frame, there are also synchronous motor support plate 40 and three-way valve support plate 42, which are used to support synchronous motor 41 and three-way valve 37, respectively.

[0044] The cavity for the electronic control components is used to house the electronic control components (see attached document). Figure 1 The control box (as shown) consists of an electrical control box 18, an electrical control box door 13, a display screen 17, start / stop switches (including an up switch and a compression / packing switch, not marked in the figure), an electrical control box door lock (not marked in the figure), a controller (not shown in the figure), a time relay (not shown in the figure), an AC contactor (not shown in the figure), and an alarm device (not marked in the figure). The electrical control box door 13 is hinged to the left side of the electrical control box 18, and the display screen 17, start / stop switches, electrical control box door lock, and alarm device are installed on it. The controller, time relay, and AC contactor are all located inside the cavity of the electrical control box 18.

[0045] The hydraulic workstation cavity is located in the lower part of the electronic control component cavity and is used to accommodate the hydraulic workstation 20.

[0046] The hydraulic workstation 20 consists of a hydraulic workstation housing (not marked in the figure), an oil tank (not shown in the figure), and an oil pump (not shown in the figure). The oil tank and the oil pump are both located inside the hydraulic workstation housing, and the oil pump is immersed in the oil in the oil tank.

[0047] The left and right hydraulic actuators consist of left and right hydraulic cylinders 8, left and right hydraulic cylinder shafts 9, left and right hydraulic cylinder input pipes 7, left and right hydraulic cylinder seat bearing plates 32, and left and right hydraulic cylinder shaft end fasteners 10. The left and right hydraulic cylinder seat bearing plates 32 are located on the left middle of the base frame 31 (they cover the left side of the base frame side frame and the upper part of the left side of the two base frame middle main support beams 50 respectively), and the left and right hydraulic cylinder seats 33 at the lower end of the left and right hydraulic cylinders 8 are set on them. The left and right hydraulic cylinder shafts 9 extend upward from the left and right hydraulic cylinders 8, and their upper ends pass through the end of the compression beam 11 of the pressure head assembly and are fixed by the left and right hydraulic cylinder shaft end fasteners 10. The left and right hydraulic cylinder input pipes 7 are rigid pipes, with their upper ends connected to the upper inner cavity of the left and right hydraulic cylinders 8 and their lower ends extending downward to the lower part of the left and right hydraulic cylinders 8, becoming the left and right hydraulic cylinder input ports 35. The left and right hydraulic cylinder output ports 34, which connect to the inner cavity of the left and right hydraulic cylinders 8, are also provided at the lower part of the left and right hydraulic cylinders 8.

[0048] The solenoid directional valve of the hydraulic control mechanism (not marked in the figure) is located inside the hydraulic workstation housing of the hydraulic workstation 20.

[0049] The synchronous motor 41 and the three-way valve 37 of the hydraulic control mechanism are respectively mounted on the synchronous motor support plate 40 and the three-way valve support plate 42 in the side frame of the base frame 31.

[0050] The output of the oil pump is split into two paths after passing through the solenoid directional valve. One path is connected to the input of the synchronous motor 41 through the synchronous motor input pipe 43, and the other path is connected to the input of the three-way valve 37 through the three-way valve input pipe 47. The output of the synchronous motor 41 is divided into two branches. The left branch connects to the left and right hydraulic cylinder input ports 35 at the lower part of the left and right hydraulic cylinder input pipes 7 of the left and right hydraulic cylinders 8 through the left end output pipe 44 of the synchronous motor, and thus connects to the upper inner cavity of the left and right hydraulic cylinders 8. The right branch connects to the left and right hydraulic cylinder input ports 35 at the lower part of the left and right hydraulic cylinder input pipes 7 of the right and right hydraulic cylinders 8 through the right end output pipe 51 of the synchronous motor, and thus connects to the upper inner cavity of the right and right hydraulic cylinders 8. The output of the synchronous motor 41 provides precise and balanced oil flow and pressure to the upper inner cavities of the left and right hydraulic cylinders 8 on both sides, which is used to drive the left and right hydraulic cylinder shafts 9 to retract downward (i.e., press down to pack).

[0051] The output of the three-way valve 37 is also divided into two branches. The left branch connects to the output ports 34 of the left and right hydraulic cylinders 8 via the left-end output pipe 46 of the three-way valve, and thus connects to the lower inner cavity of the left and right hydraulic cylinders 8. The right branch connects to the output ports 34 of the right and right hydraulic cylinders 8 via the right-end output pipe 48 of the three-way valve, and thus connects to the lower inner cavity of the right and right hydraulic cylinders 8. The output of the three-way valve 37 provides oil flow and pressure to the lower inner cavities of the left and right hydraulic cylinders 8 on both sides, which is used to drive the left and right hydraulic cylinder shafts 9 to extend upward.

[0052] The pressure head assembly consists of a compression beam 11, two left and right frames 29, a bottom frame 39, an outer plate 12 for the pressure head, a pressure plate 30, a grooved pressure plate 26, and a pressure equalization plate 27. The left and right frames 29 are tubular frames in the shape of isosceles triangles, and the bottom frame 39 is also a tubular frame in the shape of a rectangle. The bottom edges of the left and right frames 29 are connected to the left and right sides of the bottom frame 39, and their upper ends are connected to the compression beam 11. The outer plate 12 of the pressure head covers the bottom surface of the bottom frame 39, the area between its bottom edge and the compression beam 11, and the outer surfaces of the left and right frames 29. The pressure plate 30 is located below the bottom frame 39, and the pressure equalization plate 27 and the grooved pressure plate 26 are arranged in sequence below it. The grooved pressure plate 26 (usually, the grooved pressure plate 26 is made of several wooden boards, with grooves left between each two wooden boards to accommodate packing ropes) and the pressure equalization plate 27 are both made of wooden boards, and the wood grain of both is arranged perpendicularly.

[0053] Between the bottom surface of the front and rear sides of the base frame 39 and the compression beam 11 (forming a rectangle), there are also reinforcing support columns (the front reinforcing support column 38 and the rear reinforcing support column 28). The reinforcing support column can be a single column (as in this example) or two double columns in an "X" shape.

[0054] The weighing assembly consists of a pair of directional wheel sensors 2 and a universal wheel sensor 21. The pair of directional wheel sensors 2 are respectively located under the directional wheel sensor support beam 45 at the front and rear of the left side of the base frame 31, while the universal wheel sensor 21 is located under the universal wheel sensor support beam 36 at the middle of the right side of the base frame 31.

[0055] The moving component consists of a pair of directional wheels 1 and a universal wheel component. The universal wheel component consists of a universal wheel extension plate 22 and a pair of universal wheels 23. The pair of directional wheels are respectively located below a pair of directional wheel sensors. The upper middle part of the universal wheel extension plate is located below the universal wheel sensors, and the pair of universal wheels are respectively located on the front and rear sides below the universal wheel extension plate.

[0056] The stop limit switch component is located on top of the electronic control assembly. It consists of a stop plate 14, a stop limit switch 15, and a stop limit switch mounting block 16. The stop plate 14 is located on the right end face of the compression beam 11, and its position can be adjusted up and down. The stop limit switch mounting block 16 is located on the upper left side of the electronic control box 18 of the electronic control assembly. The stop limit switch 15 is located on the stop limit switch mounting block 16 and below the stop plate 14, and its signal line is connected to the controller in the electronic control assembly.

[0057] Before use, move the retractable weighing and packing machine of this embodiment to the work site and connect it to the mains power supply and the electrical control components.

[0058] In use, first, set the extension time (time relay) of the left and right hydraulic cylinder shafts 9 of the left and right hydraulic cylinders 8 and the weight alarm parameters via the setting buttons on the display screen 17 on the control box door 13. Then, release the automatic locking latch 19 of the dump trailer, and open the front or rear or front and rear upper side doors 6. Next, press the lifting switch to start the oil pump. Afterward, the pressure oil output by the oil pump is input to the input end of the three-way valve 37 after passing through the solenoid reversing valve. Then, the output end of the three-way valve 37 splits into two branches, one of which goes through... The output pipe 46 on the left side of the three-way valve 37 outputs to the output port 34 of the left and right hydraulic cylinders 8 on the left side, and then inputs to the lower inner cavity of the left and right hydraulic cylinders 8, driving the left and right hydraulic cylinder shafts 9 on the left side to extend upward; at the same time, another pipe 48 on the right side of the three-way valve 37 outputs to the output port 34 of the right and right hydraulic cylinders 8, and then connects to the lower inner cavity of the right and right hydraulic cylinders 8, driving the right and right hydraulic cylinder shafts 9 on the right side to extend upward.

[0059] When the left and right hydraulic cylinder shafts 9 extend upwards, they immediately move the pressure head assembly upwards. The rising time is controlled by a time relay, and the rising stops after reaching the preset time. At this time, the packing rope is first placed in the groove on the grooved bottom plate 3. Then, the material to be weighed and packed can be filled into the compression and packing cavity (i.e., the cavity enclosed by the front and rear lower side doors 5). When the material filled into the compression and packing cavity exceeds the preset weight (the real-time weight value will be displayed on the display screen 17), the alarm device will sound an alarm to indicate that the filled material has exceeded the weight limit. Next, close the front and rear upper doors 6 and lock the automatic locking buckle 19 of the dump trailer. Then, wrap the packing rope from the rear to the front (so that it is under the groove of the grooved pressure plate 26). After that, press the compression and packing switch. At this time, the pressure oil output by the oil pump is input to the input end of the synchronous motor 41 after passing through the solenoid reversing valve. Then, two branches are split from the output end of the synchronous motor 41. One branch is connected to the left hydraulic cylinder input port 35 at the lower part of the left and right hydraulic cylinder input pipe 7 of the left and right hydraulic cylinder 8 through the left end output pipe 44 of the left synchronous motor, and then connected to the upper inner cavity of the left and right hydraulic cylinder 8, driving the left and right hydraulic cylinder shaft 9 of the left side to retract downward for compression and packing. At the same time, the other branch is connected to the left and right hydraulic cylinder input port 35 at the lower part of the left and right hydraulic cylinder input pipe 7 of the right side hydraulic cylinder 8 through the right end output pipe 51 of the right synchronous motor, and then connected to the upper inner cavity of the right and right hydraulic cylinder 8, driving the right and right hydraulic cylinder shaft 9 of the right side to retract downward for compression and packing. Because a synchronous motor 41 is used to distribute pressure oil to the left and right hydraulic cylinders 8 on both sides, and the left and right hydraulic cylinder input pipes 7 on both sides of the left and right hydraulic cylinders 8 are all made of rigid pipes (i.e., steel pipes or copper pipes), the pressure oil volume and pressure obtained by the left and right hydraulic cylinders 8 on both sides can be guaranteed to the maximum extent, thereby ensuring the stability of the compression and packaging process.

[0060] As the left and right hydraulic cylinder shafts 9 retract downwards, when the stop plate 14 located on the right end face of the compression beam 11 touches the stop limit switch 15 located on the stop limit switch mounting block 16 on the electrical control box 18, the AC contactor is triggered, thereby cutting off the power supply to the oil pump. The left and right hydraulic cylinder shafts 9 stop retracting downwards, indicating that the compression is in place. Next, by releasing the automatic locking buckle 19 of the trailer, the front and rear upper side doors 6 and the front and rear lower side doors 5 are opened, and the packing ropes are tied. Afterwards, the lifting switch is pressed again to restart the oil pump. After the left and right hydraulic cylinder shafts 9 extend upwards to their full position, the already bundled material bag can be pulled out. Thus, a complete weighing, compression, and packing process is completed.

[0061] Since the left and right hydraulic cylinders 8 used for compression are mounted on the base frame 31, and the weighing component is mounted below the base frame 31, the pressure generated by the left and right hydraulic cylinders 8 during the compression and packaging process will not be transmitted to the weighing component, thus not affecting the service life of the weighing component.

[0062] This utility model of a retractable weighing and baling machine can be used for weighing, compressing and baling tobacco leaves, as well as for weighing, compressing and baling leafy and stem agricultural products such as rice straw, wheat straw and kelp.

Claims

1. A retractable weighing and baling machine, comprising a chassis assembly, a pressure head assembly, a weighing assembly, a hydraulic assembly, an electrical control assembly, and a moving assembly; the pressure head assembly is disposed in the upper middle part of the chassis assembly, the weighing assembly and the moving assembly are disposed sequentially from top to bottom in the lower part of the chassis assembly, the signal line of the weighing assembly is connected to the electrical control assembly, the electrical control assembly is disposed on one side of the chassis assembly, and its control line is connected to the hydraulic assembly; characterized in that: The hydraulic assembly includes a hydraulic workstation, a hydraulic control mechanism, and a hydraulic actuator. The hydraulic control mechanism includes a solenoid directional valve, a synchronous motor, and a three-way valve. The solenoid directional valve is located in the hydraulic workstation, with one end connected to the hydraulic workstation and the other end splitting into two paths: one path connects to the synchronous motor, and the other path connects to the three-way valve. The synchronous motor and the three-way valve are respectively located in the front and rear middle sections of the lower part of the chassis assembly. The other ends of the synchronous motor and the three-way valve each have two branches, which are respectively connected to the input and output ends of the left and right hydraulic actuators. The hydraulic workstation is located on the lower part of one side of the chassis assembly, the hydraulic control mechanism is located on the lower part of the chassis assembly, and the hydraulic actuator includes two sets of left and right hydraulic actuators, which are respectively located on both sides of the chassis assembly.

2. The retractable weighing and baling machine according to claim 1, characterized in that: The chassis assembly includes a chassis frame, a base frame, front and rear upper side doors, front and rear lower side doors, outer side panels, and inner lining panels. The chassis frame divides two left and right hydraulic actuator cavities, a compression and packaging cavity, an electronic control component cavity, and a hydraulic workstation cavity. The compression and packaging cavity is located between the two left and right hydraulic actuator cavities. The electronic control component cavity and the hydraulic workstation cavity are respectively located on the upper and lower parts of one side of the left and right hydraulic actuator cavity. The outer side panels cover the outside of the left and right hydraulic actuator cavity, the electronic control component cavity, and the hydraulic workstation cavity. The inner lining panels cover the left and right sides and the bottom of the compression and packaging cavity. One side of the front and rear upper side doors and the front and rear lower side doors are respectively hinged to one side of the upper and lower parts of the front and rear sides of the compression and packaging cavity, and the other side is respectively equipped with an automatic locking buckle for a dump truck.

3. The retractable weighing and baling machine according to claim 2, characterized in that: The front and rear upper side doors and the front and rear lower side doors are composed of a tubular frame and an inner lining plate, with the inner lining plate covering the inner side of the tubular frame.

4. The retractable weighing and baling machine according to claim 1, characterized in that: The pressure head assembly includes a compression beam, two left and right frames, a bottom frame, an outer pressure head plate, a pressure plate, and a grooved pressure plate. The left and right frames are in the shape of isosceles triangles, and the bottom frame is rectangular. The bottom edges of the left and right frames are connected to the left and right sides of the bottom frame, and their upper ends are connected to the compression beam. The outer pressure head plates cover the bottom surface of the bottom frame, the area between its bottom edge and the compression beam, and the outer surfaces of the left and right frames. The pressure plate is located below the bottom frame, and a grooved pressure plate is located below it.

5. The retractable weighing and baling machine according to claim 4, characterized in that: Reinforcing support columns are also provided between the bottom surfaces of the front and rear sides of the base frame and the compression beam.

6. The retractable weighing and baling machine according to claim 5, characterized in that: The reinforcing support column is a single column or two columns arranged in an "X" shape.

7. The retractable weighing and baling machine according to claim 5, characterized in that: A pressure equalization plate is also provided between the pressure plate and the grooved pressure plate.

8. The retractable weighing and baling machine according to claim 1, characterized in that: The weighing assembly includes a pair of directional wheel sensors and a universal wheel sensor. The pair of directional wheel sensors are respectively located at the front and rear of the lower left side of the base frame, and the universal wheel sensor is located at the middle of the lower right side of the base frame.

9. The retractable weighing and baling machine according to claim 8, characterized in that: The electronic control component includes the moving component, which includes a pair of directional wheels and a universal wheel component. The universal wheel component includes a universal wheel extension plate and a pair of universal wheels. The pair of directional wheels are respectively disposed below a pair of directional wheel sensors. The upper middle part of the universal wheel extension plate is disposed below the universal wheel sensors, and the pair of universal wheels are respectively disposed on the front and rear sides below the universal wheel extension plate.

10. The retractable weighing and baling machine according to claim 4, characterized in that: A stop limit switch component is also provided on the top of the electronic control assembly. The stop limit switch component includes a stop plate, a stop limit switch and a stop limit switch mounting block. The stop plate is located at one end of the compression beam, the stop limit switch mounting block is located on the top of the electronic control assembly, and the stop limit switch is located on the stop limit switch mounting block and below the stop plate.

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