Automatic grain loading system

Abstract

The invention relates to an automatic grain truck loading system, and relates to the technical field of bulk grain truck loading, the automatic grain truck loading system comprises a truck loading system main body and a truck loading positioning mechanism, the truck loading system main body is provided with a truck loading channel, and the truck loading positioning mechanism comprises a supporting box, a truck loading plate, a positioning assembly and a moving assembly; the supporting box is embedded in the bottom end of the loading channel, and the vehicle carrying plate is arranged at a box opening in the top end of the supporting box and slidably connected with the supporting box. The positioning assembly is arranged on the vehicle carrying plate and used for positioning the initial positions of the truck and the hopper, and the moving assembly is arranged between the vehicle carrying plate and the supporting box and used for driving the vehicle carrying plate to move relative to the supporting box at a fixed distance. The method has the effect of improving the positioning accuracy of the truck and the hopper.

Description

Technical Field

[0001] The present application relates to the technical field of bulk grain loading, and in particular to an automatic grain loading system. Background Art

[0002] Bulk grain is usually stored in a silo and loaded into a truck through a hopper connected to the silo. In order to reduce the labor intensity of bulk grain loading, existing bulk grain is automatically loaded using an automated loading system.

[0003] The automated loading system uses cameras, voice players, displays, and central control devices to realize automatic loading of bulk grains. At the same time, automatic barriers are set at the entrance and exit of the truck to automatically control the loading rhythm of the truck. The camera takes real-time photos of the bulk grains loaded into the truck and transmits the image information to the central control device for automatic analysis. After analyzing the image information, the central control device controls the operation of the voice player and display. The voice player prompts the truck driver to control the truck to move and brake in the form of voice, and the display prompts the truck driver in the form of text to the current loading status, so that the truck driver can independently complete the loading of bulk grains without human assistance, thereby reducing the labor intensity of bulk grain loading.

[0004] Although truck drivers can load automatically without human assistance, the trucks are always operated manually, which makes it difficult to accurately position the truck relative to the hopper, and even requires reversing for repositioning. Summary of the invention

[0005] In order to improve the accuracy of positioning the truck and the hopper, the present application provides an automatic grain loading system.

[0006] The present application provides an automatic grain loading system, which adopts the following technical solution: An automatic grain loading system comprises a loading system body and a loading positioning mechanism, wherein the loading system body is provided with a loading channel, and the loading positioning mechanism comprises a supporting box, a loading plate, a positioning assembly and a moving assembly; The positioning assembly includes a positioning part, a transmission part and a fixing part, the positioning part includes a first positioning plate, a second positioning plate and a positioning oil cylinder, and the transmission part includes a first gear, a second gear, a transmission rod, a first rack and a second rack; The moving assembly includes a vehicle moving part and a plate moving part; The support box is embedded at the bottom of the loading channel, and the loading plate is arranged at the box opening position at the top of the support box and is slidably connected with the support box; The first positioning plate and the second positioning plate are respectively hinged to the front end and the rear end of the vehicle loading plate through the hinge shaft, and the positioning cylinder is located at the front end of the vehicle loading plate and is connected to the vehicle loading plate; The first gear is located at one end of the first positioning plate and is fixedly connected to the first positioning plate through a hinge shaft, the second gear is located at one end of the second positioning plate close to the first gear, the second gear is fixedly connected to the second positioning plate through a hinge shaft, the transmission rod is slidably connected to one side of the vehicle-carrying plate close to the first gear, the first rack is fixedly connected to one end of the transmission rod close to the first gear, the first rack is meshed with the first gear, the second rack is fixedly connected to one end of the transmission rod close to the second gear, and the second rack is meshed with the second gear; The clamping portion is arranged between the vehicle loading plate and the transmission rod, and is used to limit the transmission rod from sliding in a direction close to the first gear; The vehicle moving part and the plate moving part are both arranged between the vehicle loading plate and the supporting box. The vehicle moving part is used to drive the vehicle loading plate to move forward relative to the supporting box at a fixed distance, and the plate moving part is used to continuously and quickly drive the vehicle loading plate to move backward relative to the supporting box. In the initial state, the first positioning plate is perpendicular to the vehicle loading plate, the second positioning plate is parallel to the vehicle loading plate, the positioning cylinder is in an extended state, and the first positioning plate can abut against the movable end of the positioning cylinder after rotation.

[0007] By adopting the above technical solution, the truck enters the loading channel and can move onto the loading plate, the front wheel of the truck can squeeze the first positioning plate to rotate until the first positioning plate abuts against the movable end of the positioning cylinder, and the first positioning plate positions the front wheel of the truck, and the first positioning plate synchronously drives the second positioning plate to rotate through the first gear, the first rack, the transmission rod, the second rack and the second gear, so that the second positioning plate positions the rear wheel of the truck, and under the restriction of the positioning cylinder on the first positioning plate and the restriction of the sliding direction of the transmission rod by the fixing part, the first positioning plate and the second positioning plate can be fixed relative to the loading plate, so that the truck is positioned on the loading plate, so that the position of the truck relative to the hopper during initial loading can be accurately positioned.

[0008] The vehicle moving part drives the vehicle loading plate to move at a fixed distance, so that the vehicle loading plate can move the truck at a fixed distance, thereby enabling the truck to move a determined distance relative to the hopper, thereby improving the accuracy of the movement and positioning of the truck during the loading process.

[0009] After the truck moves away from the loading plate, the plate shifting part can quickly move the loading plate back to the truck entry port position of the loading channel, so that the loading plate can quickly receive the next truck.

[0010] Thus, the accuracy of positioning the truck and the hopper is improved by positioning the truck relative to the starting position of the hopper and moving the truck a certain distance during the loading process.

[0011] Optionally, the clamping part includes a serrated bar, a clamping tooth and a clamping spring, the serrated bar is fixed to the middle part of the transmission rod, the vertical side of the serrated groove on the serrated bar is arranged close to the second gear, the clamping tooth is slidably connected to the carrier plate, the clamping spring is arranged between the clamping tooth and the carrier plate, and is used to drive the end of the clamping tooth to clamp into one of the serrated grooves of the serrated bar.

[0012] By adopting the above technical solution, the locking teeth can, through the elastic force of the locking spring, enable the transmission rod to slide toward the second gear on the one hand, and on the other hand, limit the transmission rod from sliding toward the first gear, so that the second positioning plate is not easy to rotate in the opposite direction under the pressure of the rear wheels of the truck, so that the positioning of the second positioning plate to the rear wheels of the truck is reliable and stable.

[0013] Optionally, the vehicle moving unit includes: There are at least two car moving cylinders, which are symmetrically arranged on both sides of the sliding direction of the car loading plate, and the car moving cylinders are hinged to the car loading plate; At least two car moving blocks are provided and are hinged to the movable ends of the car moving cylinders in a one-to-one correspondence; Two first car moving bars are provided and are respectively fixed on both sides of the support box close to the car loading plate. A plurality of car moving slots are provided on the first car moving bars, and the plurality of car moving slots are evenly arranged along the sliding direction of the car loading plate. Among them, the car moving block is used to be clamped in the car moving slot to provide supporting force to the car moving cylinder. A first return torsion spring is arranged at the hinge between the car moving cylinder and the car loading plate. The first return torsion spring is used to drive the car moving cylinder to rotate toward the direction close to the side wall of the support box. A second return torsion spring is arranged at the hinge between the movable end of the car moving cylinder and the car moving block. The second return torsion spring is used to drive the car moving block to rotate toward the direction close to the side wall of the support box.

[0014] By adopting the above technical solution, under the elastic force of the first return torsion spring and the second return torsion spring, the car moving block can be clamped into the car moving slot. When the symmetrically arranged car moving cylinder is extended, the car moving cylinder can use the clamping force of the car moving block relative to the car moving slot as a supporting force to drive the car loading plate to move. Since the extension length of the car moving cylinder is a fixed value, the car loading plate can be easily moved a fixed distance.

[0015] Optionally, the plate moving part includes a coil spring and a steel wire rope, the coil spring is arranged at one end of the support box close to the rear end of the vehicle loading plate, one end of the steel wire rope is connected to the coil spring, and the other end is connected to the vehicle loading plate, the steel wire rope is wound on the coil spring, and the coil spring is used to drive the steel wire rope to reel.

[0016] By adopting the above technical solution, during the movement of the vehicle loading plate, the vehicle loading plate can accumulate elastic force in the coil spring by pulling the wire rope, so that when the vehicle loading plate needs to move back, the coil spring can move the vehicle loading plate continuously and quickly through the elastic force.

[0017] Optionally, the car moving part also includes a limit block, a limit spring and a second car moving strip. The limit block is slidably arranged in a slide groove opened on one side of the sliding direction of the car loading plate, the limit spring is arranged between the limit block and the bottom of the slide groove, the second car moving strip is fixed on one side of the support box close to the limit block, and the second car moving strip is evenly provided with a plurality of serrated limit grooves along the sliding direction of the car loading plate. The vertical side of the serrated limit groove is arranged close to the coil spring, and the limit spring is used to drive the end of the limit block to be clamped in the serrated limit groove.

[0018] By adopting the above technical scheme, the limit block can be clamped in the serrated limit groove under the elastic force of the limit spring. On the one hand, the clamping of the limit block and the serrated limit groove can prevent the loading plate from moving back under the tension formed by the coil spring. On the other hand, the clamping of the limit block and the serrated limit groove can cooperate with the tension formed by the coil spring to keep the position of the loading plate stable.

[0019] Optionally, the loading positioning mechanism also includes a reset component, the reset component includes a first reset part and a second reset part, the first reset part is used to control the extension and retraction of the positioning cylinder and the lifting and lowering of the loading plate based on the weight of the loading plate, and the second reset part is used to control the reset of the first positioning plate and the second positioning plate.

[0020] By adopting the above technical scheme, after the truck is fully loaded, the first reset part can control the positioning cylinder to retract, so that the truck can directly roll over the first positioning plate and drive out of the loading plate; after the truck drives out of the loading plate, the first reset part can control the positioning cylinder to extend and reset, and the first reset part can control the loading plate to descend, so that the moving block slides out of the moving slot and the limiting block slides out of the serrated limiting slot, so that the coil spring can drive the loading plate to move back quickly through the pull rope; when the loading plate moves back to the truck entrance port position of the loading channel, the first reset part controls the loading plate to rise, so that the moving block slides back into the moving slot and the limiting block slides back into the serrated limiting slot; the second reset part resets the first positioning plate and the second positioning plate, so that the first positioning plate and the second positioning plate can position the next truck, thereby enabling the loading positioning mechanism to reposition and load the next truck by resetting the first positioning plate, the second positioning plate and the loading plate.

[0021] Optionally, a support plate is provided on one side of the vehicle loading plate close to the bottom of the support box, the support plate is slidably connected to the support box, and is fixedly connected to one end of the wire rope away from the coil spring, and the first reset part includes a reset oil cylinder, a liquid pressure sensor and a controller; There are multiple reset oil cylinders, all of which are located between the vehicle-carrying plate and the support plate. The reset oil cylinder is fixedly connected to the support plate, and the movable end of the reset oil cylinder is fixedly connected to the vehicle-carrying plate. The liquid pressure sensor is fixedly arranged in the rodless cavity of one of the reset oil cylinders, and is used to output a hydraulic signal. The controller is electrically connected to the liquid pressure sensor, all the reset oil cylinders and the positioning oil cylinder respectively. The controller responds to the hydraulic signal output by the liquid pressure sensor, and is used to control the extension and contraction of the positioning oil cylinder and the contraction of all the reset oil cylinders. When the hydraulic signal is not less than the first set value, the controller controls the positioning cylinder to retract; When the hydraulic signal is not greater than the second set value, the controller controls the positioning cylinder to extend, and controls all the reset cylinders to retract.

[0022] By adopting the above technical solution, the liquid pressure in the rodless chamber of the reset cylinder can directly feedback the load condition of the loading plate. The first set value is the hydraulic signal output by the liquid pressure sensor after the loading plate is fully loaded with trucks, and the second set value is the hydraulic signal output by the liquid pressure sensor after the loading plate is unloaded.

[0023] When the hydraulic signal is not less than the first set value, the truck is fully loaded. At this time, the controller controls the positioning cylinder to retract according to the hydraulic signal so that the truck can drive out of the loading plate; when the hydraulic signal is not greater than the second set value, the truck has completely driven out of the loading plate. At this time, the controller controls the positioning cylinder to extend and reset according to the hydraulic signal, and controls all the reset cylinders to retract, so that the moving block slides out of the moving slot and the limit block slides out of the serrated limit slot, so that the loading plate can move back under the elastic force of the coil spring, thereby enabling the positioning cylinder to be reset and the loading plate to move back.

[0024] Optionally, the first reset part also includes a buffer block, a buffer spring and a displacement sensor, the buffer block is located at one end of the support box close to the rear end of the vehicle loading plate, and the buffer block is slidably arranged in a buffer groove opened on the top of the support box; the buffer spring is arranged between the buffer block and the bottom of the buffer groove, and is used to drive the buffer block to slide into the interior of the support box; the displacement sensor is embedded in the bottom of the buffer groove, and is used to output a displacement signal between the buffer block and the bottom of the buffer groove; the displacement sensor is electrically connected to the controller, the controller responds to the displacement signal output by the displacement sensor, and is used to control all reset cylinders to extend.

[0025] By adopting the above technical scheme, the returning vehicle loading plate hits the buffer block, and the buffer block squeezes the buffer spring to buffer the impact force of the vehicle loading plate, so that the vehicle loading plate and the supporting box are not easily damaged by the impact; when the vehicle loading plate hits the buffer block and the buffer block slides into the buffer groove, the displacement signal output by the displacement sensor changes, and the controller controls all the reset cylinders to extend according to the displacement signal, so that the vehicle moving block slides into the vehicle moving slot again and the limit block slides into the serrated limit slot again, thereby making the vehicle loading plate less likely to be damaged by the impact and enabling the vehicle loading plate to be reset.

[0026] Optionally, the second resetting unit includes: A pull rope, one end of which is fixedly connected to the clamping teeth; The magnetic block is slidably connected to the vehicle carrier plate and is disposed close to the positioning cylinder, and the other end of the pull rope is fixedly connected to the magnetic block; The iron plate is fixed on the movable end of the positioning cylinder. When the movable end of the positioning cylinder is retracted, the iron plate and the magnetic block are attached and adsorbed; A return spring is arranged between the transmission rod and the vehicle-carrying plate and is used to drive the transmission rod to slide toward a direction close to the first gear; Among them, a plurality of guide wheels are arranged around the pull rope, the guide wheels are rotatably connected with the vehicle loading plate, and the direction in which the pull rope pulls the fixed teeth is the direction in which the fixed teeth escape from the sawtooth groove of the sawtooth bar.

[0027] By adopting the above technical solution, when the positioning cylinder is extended to reset, the movable end of the positioning cylinder can pull the pull rope to move through the adsorption force of the iron plate and the magnetic block, and the pull rope can pull the fixed teeth out of the serrated groove of the serrated bar under the guidance of the guide wheel, so that the transmission rod can drive the first positioning plate and the second positioning plate to reset under the elastic force of the reset spring.

[0028] Optionally, a side of the support plate away from the vehicle loading plate is connected to a moving wheel via a moving shaft, the moving shaft is fixedly connected to the moving wheel and is rotatably connected to the support plate, a crankshaft portion is bent on the moving shaft, and the moving wheel abuts against the bottom end of the support box; The moving assembly further includes a damping part, which includes a damper, a slider, an extrusion rod and an extrusion plate; One end of the damper is rotatably connected to the crankshaft, and the other end is hinged to the slider, which is slidably arranged in a sliding hole provided on the support plate; The extrusion rod and the extrusion plate are both located between the vehicle-carrying plate and the support plate. The extrusion rod is fixedly connected to the vehicle-carrying plate, and the extrusion plate is fixedly connected to the extrusion rod. When the resetting oil cylinder contracts, the extrusion plate is pressed onto the slide block.

[0029] By adopting the above technical solution, after the reset cylinder drives the carrier plate to descend, the carrier plate can squeeze the extrusion plate onto the slider through the extrusion rod, so that the slider is fixed relative to the support plate, and the support plate can drive the moving wheel and the moving shaft to rotate under the elastic force of the coil spring, and the crankshaft part of the moving shaft can cyclically pull the damper, and the damper provides a damping effect on the movement of the support plate, thereby reducing the return impact of the support plate; when the reset cylinder drives the carrier plate to rise, the carrier plate releases the fixation of the extrusion plate to the slider through the extrusion rod, so that the crankshaft part can release the damping effect by sliding the slider when driving the damper, so that the support plate is not easily affected by the damping effect when moving forward.

[0030] In summary, the present application includes at least one of the following beneficial technical effects: 1. By setting the first positioning plate, the second positioning plate, the positioning cylinder, the vehicle moving cylinder and the vehicle moving block, the accuracy of the initial positioning of the truck relative to the hopper and the moving positioning during the loading process is improved; 2. By arranging the first gear, the second gear, the transmission rod, the first rack, the second rack, the sawtooth bar, the clamping teeth and the clamping spring, the first positioning plate and the second positioning plate can synchronously realize the positioning of the truck; 3. By providing the first reset portion and the second reset portion, the first positioning plate, the second positioning plate and the vehicle loading plate can be easily reset; 4. By arranging the damper, the slider, the extrusion rod and the extrusion plate, the return impact of the vehicle loading plate can be buffered, so that it is not easy to have a violent collision between the vehicle loading plate and the support box. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application; Figure 2 It is a structural schematic diagram of the loading positioning mechanism; Figure 3 yes Figure 2 Magnified view at A in the middle; Figure 4 yes Figure 2 Magnified view at B in the middle; Figure 5 yes Figure 2 Enlarged view at center C; Figure 6 It is a structural diagram of the car moving unit; Figure 7 It is a structural schematic diagram of the shifting plate portion; Figure 8 It is a structural diagram of the damping part.

[0032] Description of reference numerals: 1. Loading system body; 11. Loading channel; 2. Loading positioning mechanism; 3. Support box; 31. Buffer slot; 32. Give way slot; 33. Support slot; 4. Car loading plate; 41. Slide; 5. Positioning assembly; 51. Positioning part; 511. First positioning plate; 512. Second positioning plate; 513. Positioning cylinder; 52. Transmission part; 521. First gear; 522. Second gear; 523. Transmission rod; 524. First rack; 525. Second rack; 53. Fixing part; 531. Sawtooth bar; 532. Fixing teeth; 533. Fixing spring; 6. Moving assembly; 61. Car moving part; 611. Car moving cylinder; 6111. First return torsion spring; 6112. Second return torsion spring; 612. Car moving block; 613. First car moving strip; 61 31. Car moving slot; 614. Limiting card block; 615. Limiting spring; 616. Second car moving strip; 6161. Sawtooth limiting slot; 62. Moving plate part; 621. Coil spring; 622. Wire rope; 63. Damping part; 631. Damper; 632. Sliding block; 633. Extrusion rod; 634. Extrusion plate; 7. Reset assembly; 71. First reset part; 711. Reset cylinder; 712. Liquid pressure sensor; 713. Controller; 714. Buffer block; 715. Buffer spring; 716. Displacement sensor; 72. Second reset part; 721. Pull rope; 722. Magnetic block; 723. Iron plate; 724. Reset spring; 725. Guide wheel; 8. Support plate; 81. Moving shaft; 811. Crankshaft part; 82. Moving wheel; 83. Sliding hole. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-8 This application is described in further detail.

[0034] The present application embodiment discloses a grain automatic loading system. Figure 1 and Figure 2 A grain automatic loading system includes a loading system body 1 and a loading positioning mechanism 2. The loading system body 1 is provided with a loading channel 11. The loading positioning mechanism 2 includes a support box 3, a loading plate 4, a positioning component 5 and a moving component 6. The support box 3 is embedded in the bottom end of the loading channel 11. The loading plate 4 is arranged at the box mouth position at the top of the support box 3 and is slidably connected to the support box 3. The positioning component 5 is arranged on the loading plate 4 and is used to locate the initial position of the truck and the hopper. The moving component 6 is arranged between the loading plate 4 and the support box 3 and is used to drive the loading plate 4 to move relative to the support box 3 at a fixed distance.

[0035] When in use, the truck drives onto the loading plate 4, the positioning component 5 positions the truck so that the starting positions of the truck and the hopper are accurately positioned, and the moving component 6 moves the loading plate 4 at a fixed distance so that the truck can be accurately positioned relative to the movement of the hopper during loading, thereby improving the accuracy of the positioning of the truck and the hopper.

[0036] Reference Figure 1 The loading channel 11 is rectangular and horizontally arranged. One port of the loading channel 11 is a truck entry port, and the other port is a truck exit port. The support box 3 is a rectangular box shape, and the length direction is parallel to the driving direction of the truck of the loading channel 11.

[0037] Reference Figure 2 The loading plate 4 is in the shape of a rectangular plate and is arranged horizontally. The length direction of the loading plate 4 is parallel to the length direction of the supporting box 3. The sliding direction of the loading plate 4 and the supporting box 3 is the driving direction of the truck.

[0038] A support plate 8 is provided on one side of the vehicle loading plate 4 close to the bottom of the support box 3. The support plate 8 is in the shape of a rectangular plate and is horizontally arranged. The support plate 8 is connected to the vehicle loading plate 4, and a plurality of movable shafts 81 are rotatably connected to the side away from the vehicle loading plate 4. The movable shafts 81 are evenly arranged along the sliding direction of the vehicle loading plate 4, and the axial direction of the movable shafts 81 is perpendicular to the sliding direction of the vehicle loading plate 4. Both ends of the axial direction of the movable shafts 81 are coaxially fixed with movable wheels 82, and the movable wheels 82 abut against the bottom end of the support box 3.

[0039] Reference Figure 1 and Figure 2 The positioning assembly 5 includes a positioning part 51, a transmission part 52 and a fixing part 53. The positioning part 51 includes a first positioning plate 511, a second positioning plate 512 and a positioning cylinder 513. The first positioning plate 511 and the second positioning plate 512 are both rectangular plates, and are respectively hinged to the front end and the rear end of the vehicle loading plate 4 through a hinge shaft. The front end of the vehicle loading plate 4 is the end of itself close to the truck exit port of the loading channel 11, and the rear end of the vehicle loading plate 4 is the end of itself close to the truck entrance port of the loading channel 11.

[0040] Reference Figure 2 The positioning cylinder 513 is located at the forward end of the vehicle-carrying plate 4 and is vertically arranged. The positioning cylinder 513 is fixedly connected to the support plate 8. The movable end of the positioning cylinder 513 is located above itself. When the positioning cylinder 513 is retracted, the positioning cylinder 513 is completely located below the vehicle-carrying plate 4. In the initial state, the first positioning plate 511 is perpendicular to the vehicle-carrying plate 4, the second positioning plate 512 is parallel to the vehicle-carrying plate 4, the positioning cylinder 513 is in an extended state, and the first positioning plate 511 can abut against the movable end of the positioning cylinder 513 after rotation.

[0041] Reference Figure 3 and Figure 4The transmission part 52 includes a first gear 521, a second gear 522, a transmission rod 523, a first rack 524 and a second rack 525. The first gear 521 is located at one end of the first positioning plate 511 and is fixedly connected to the first positioning plate 511 through a hinge shaft. The second gear 522 is located at one end of the second positioning plate 512 close to the first gear 521 and is fixedly connected to the second positioning plate 512 through a hinge shaft. The first gear 521 and the first positioning plate 511 are both fixedly connected to the hinge shaft close to the first positioning plate 511, and the second gear 522 and the second positioning plate 512 are both fixedly connected to the hinge shaft close to the second positioning plate 512, and the hinge shaft is rotatably connected to the vehicle carrier plate 4.

[0042] The transmission rod 523 is in the shape of a rectangular rod and is slidably connected to one side of the vehicle carrier plate 4 close to the first gear 521. The first rack 524 is fixedly connected to one end of the transmission rod 523 close to the first gear 521 and meshes with the first gear 521. The second rack 525 is fixedly connected to one end of the transmission rod 523 close to the second gear 522 and meshes with the second gear 522.

[0043] Reference Figure 4 and Figure 5 The fixing portion 53 includes a sawtooth bar 531, a fixing tooth 532 and a fixing spring 533. The sawtooth bar 531 is fixed to the middle part of the transmission rod 523, and the vertical side of the sawtooth groove on the sawtooth bar 531 is arranged close to the second gear 522; the fixing tooth 532 is in the shape of a rectangular block and is arranged vertically. The bottom end of the fixing tooth 532 is in the shape of a triangle that matches the sawtooth groove on the sawtooth bar 531, and the fixing tooth 532 is slidably connected to the vehicle loading plate 4 in the vertical direction; the fixing spring 533 is fixed between the fixing tooth 532 and the vehicle loading plate 4, and is used to drive the bottom end of the fixing tooth 532 to be clamped in one of the sawtooth grooves of the sawtooth bar 531.

[0044] When in use, the truck moves onto the loading plate 4, and the front wheel of the truck rolls over the first positioning plate 511, which drives the first positioning plate 511 to rotate until the first positioning plate 511 abuts against the movable end of the positioning cylinder 513, and the first positioning plate 511 positions the front wheel of the truck, and the first gear 521 drives the first rack 524 to slide, and the first rack 524 drives the transmission rod 523 to slide, and the transmission rod 523 drives the second rack 525 and the sawtooth bar 531 to slide, and the second rack 525 drives the second gear 522 to rotate, and the second gear 522 drives the second positioning plate 512 to rotate, and the second positioning plate 512 positions the rear wheel of the truck, and the fixing tooth 532 is clamped in the serrated groove of the sawtooth bar 531 under the elastic force of the fixing spring 533, so that the second positioning plate 512 is not easy to rotate in the opposite direction, thereby realizing the positioning of the truck relative to the starting position of the hopper.

[0045] Reference Figure 2 , Figure 6 and Figure 7The moving assembly 6 includes a moving part 61 and a moving plate part 62. The moving part 61 includes a moving cylinder 611, a moving block 612, a first moving strip 613, a limiting block 614, a limiting spring 615 and a second moving strip 616. Four moving cylinders 611 are provided, and are symmetrically arranged on both sides of the sliding direction of the vehicle-carrying plate 4. The moving cylinder 611 is hinged to the vehicle-carrying plate 4, and the moving cylinder 611 is inclined in the direction away from the vehicle-carrying plate 4 toward the direction close to the rear end of the vehicle-carrying plate 4; four moving blocks 612 are provided, and correspond to the moving cylinders 611 one by one. The moving block 612 is in the shape of a right-angled triangle, and one of the straight-faced sides is hinged to the movable end of the moving cylinder 611, and the other straight-faced side of the moving block 612 is perpendicular to the sliding direction of the vehicle-carrying plate 4, and the inclined direction of the inclined side of the moving block 612 is in the direction away from the vehicle-carrying plate 4 toward the direction close to the rear end of the vehicle-carrying plate 4.

[0046] Reference Figure 2 and Figure 6 There are two first car moving bars 613, which are respectively fixed on both sides of the support box 3 near the car loading plate 4. The first car moving bars 613 are rectangular, and the length direction is consistent with the length direction of the support box 3. The first car moving bars 613 are provided with a plurality of car moving slots 6131, which are evenly arranged along the sliding direction of the car loading plate 4. The car moving slots 6131 are adapted to the car moving blocks 612, and the car moving slots 6131 run through both sides of the length direction of the first car moving bars 613. The car moving blocks 612 are used to be clamped in the car moving slots 6131 to provide support force to the car moving oil cylinder 611.

[0047] Reference Figure 6 A first return torsion spring 6111 is provided at the hinge of the car moving oil cylinder 611 and the car loading plate 4, one end of the first return torsion spring 6111 is fixedly connected to the car moving oil cylinder 611, and the other end is fixedly connected to the car loading plate 4, and the first return torsion spring 6111 is used to drive the car moving oil cylinder 611 to rotate in the direction close to the side wall of the support box 3. A second return torsion spring 6112 is provided at the hinge of the movable end of the car moving oil cylinder 611 and the car moving block 612, one end of the second return torsion spring 6112 is fixedly connected to the movable end of the car moving oil cylinder 611, and the other end is fixedly connected to the car moving block 612, and the second return torsion spring 6112 is used to drive the car moving block 612 to rotate in the direction close to the side wall of the support box 3.

[0048] Reference Figure 2 and Figure 7The limiting block 614 is in a rectangular block shape and is provided with two. The two limiting blocks 614 are symmetrically arranged on both sides of the sliding direction of the vehicle loading plate 4. The limiting block 614 is slidably arranged in the slide groove 41 provided on the vehicle loading plate 4. The sliding direction of the limiting block 614 is perpendicular to the sliding direction of the vehicle loading plate 4. There are two limiting springs 615, which correspond to the limiting blocks 614 one by one. The limiting springs 615 are fixed between the limiting block 614 and the bottom of the slide groove 41.

[0049] Two second moving car bars 616 are provided, and are respectively fixed on both sides of the support box 3 close to the loading plate 4. The second moving car bar 616 is located above the first moving car bar 613. The second moving car bar 616 is in the shape of a rectangular strip, and its length direction is consistent with the length direction of the support box 3. The second moving car bar 616 is evenly provided with a plurality of serrated limit grooves 6161 along the sliding direction of the loading plate 4. The vertical side of the serrated limit groove 6161 is arranged close to the rear end of the loading plate 4. The end of the limiting block 614 away from the bottom of the slide groove 41 is adapted to the serrated limit groove 6161. The serrated limit groove 6161 runs through both sides of the length direction of the second moving car bar 616. The limiting spring 615 is used to drive the end of the limiting block 614 away from the bottom of the slide groove 41 to be clamped in the serrated limit groove 6161.

[0050] Reference Figure 2 The shifting plate portion 62 includes a coil spring 621 and a steel wire rope 622. The coil spring 621 is located at one end of the support box 3 close to the rear end of the vehicle loading plate 4, and is located in a make way groove 32 opened on the inner wall of the support box 3. One end of the coil spring 621 is fixedly connected to the support box 3, one end of the steel wire rope 622 is fixedly connected to the other end of the coil spring 621, and the other end of the steel wire rope 622 is fixedly connected to the support plate 8. The coil spring 621 is used to drive the steel wire rope 622 to reel.

[0051] During use, when it is necessary to move the truck relative to the hopper, the moving cylinder 611 is extended, and the moving cylinder 611 drives the loading plate 4 to move a fixed distance with the card relay of the moving block 612 relative to the moving slot 6131, and then the moving cylinder 611 is retracted. During the retraction of the moving cylinder 611, the first return torsion spring 6111 drives the moving cylinder 611 to rotate toward the first moving bar 613, and the second return torsion spring 6112 drives the moving block 612 to rotate toward the first moving bar 613. After the moving cylinder 611 is completely retracted, the first return torsion spring 6111 and the second return torsion spring 6112 cooperate to make the moving block 612 be clamped in the next moving slot 6131, and the above process is repeated, so that the truck can be accurately moved a fixed distance relative to the hopper.

[0052] When the vehicle loading plate 4 moves, the vehicle loading plate 4 unwinds the steel wire rope 622 through the support plate 8, and the coil spring 621 accumulates elastic force. During the contraction of the vehicle moving cylinder 611, the limit block 614 is clamped in the serrated limit groove 6161 under the elastic force of the limit spring 615, so that the vehicle loading plate 4 is not easy to move back under the elastic force of the coil spring 621; when the vehicle loading plate 4 needs to be moved back, the connection between the vehicle moving block 612 and the vehicle moving groove 6131 and the connection between the limit block 614 and the serrated limit groove 6161 are released, and the coil spring 621 drives the steel wire rope 622 to reel through the elastic force, so that the vehicle loading plate 4 can move back quickly.

[0053] Reference Figure 2 The loading positioning mechanism 2 also includes a reset component 7, which includes a first reset part 71 and a second reset part 72. The first reset part 71 includes a reset cylinder 711, a liquid pressure sensor 712, a controller 713, a buffer block 714, a buffer spring 715 and a displacement sensor 716. There are multiple reset cylinders 711, and they are all located between the vehicle loading plate 4 and the support plate 8. The multiple reset cylinders 711 are arranged in a matrix. The reset cylinders 711 are vertically arranged. The reset cylinders 711 are fixedly connected to the support plate 8, and the movable end of the reset cylinder 711 is fixedly connected to the vehicle loading plate 4.

[0054] The liquid pressure sensor 712 is fixed in the rodless cavity of one of the reset cylinders 711 near the forward end of the vehicle carrier plate 4, and the liquid pressure sensor 712 is used to output a hydraulic signal. The controller 713 is fixed on the support plate 8, and the controller 713 is electrically connected to the liquid pressure sensor 712, all the reset cylinders 711 and the positioning cylinder 513 respectively. The controller 713 responds to the hydraulic signal output by the liquid pressure sensor 712, and is used to control the extension and contraction of the positioning cylinder 513 and the contraction of all the reset cylinders 711.

[0055] When the hydraulic signal is not less than the first set value, the controller 713 controls the positioning cylinder 513 to retract; when the hydraulic signal is not greater than the second set value, the controller 713 controls the positioning cylinder 513 to extend, and controls all the reset cylinders 711 to retract; wherein, the first set value is the hydraulic signal output by the liquid pressure sensor 712 after the loading plate 4 is fully loaded with a truck, and the second set value is the hydraulic signal output by the liquid pressure sensor 712 after the loading plate 4 is unloaded.

[0056] The buffer block 714 is in the shape of a rectangular block and is located at one end of the support box 3 near the rear end of the vehicle loading plate 4. The buffer block 714 is slidably arranged in the buffer groove 31 opened at the top of the inner wall of the support box 3. The buffer spring 715 is fixed between the buffer block 714 and the bottom of the buffer groove 31, and is used to drive the buffer block 714 to slide into the interior of the support box 3. The displacement sensor 716 is embedded in the bottom of the buffer groove 31, and the displacement sensor 716 is used to output the displacement signal between the buffer block 714 and the bottom of the buffer groove 31. The displacement sensor 716 is electrically connected to the controller 713, and the controller 713 responds to the displacement signal output by the displacement sensor 716, and is used to control all the reset cylinders 711 to extend.

[0057] After the return cylinder 711 extends, the buffer block 714 is slidably inserted under the second positioning plate 512 to provide support for the second positioning plate 512. A support groove 33 for providing support force for the first positioning plate 511 is provided at one end of the support box 3 close to the forward end of the vehicle loading plate 4.

[0058] Reference Figure 2 , Figure 3 and Figure 5 The second reset portion 72 includes a pull rope 721, a magnet 722, an iron plate 723 and a reset spring 724. One end of the pull rope 721 is fixedly connected to the fixed tooth 532, and the other end is fixedly connected to the magnet 722. The magnet 722 is in the shape of a rectangular block and is slidably connected to the vehicle carrier plate 4 in the vertical direction. The magnet 722 is arranged close to the positioning cylinder 513. The iron plate 723 is in the shape of a rectangular plate and is fixedly arranged on the movable end of the positioning cylinder 513. When the movable end of the positioning cylinder 513 contracts, one side of the iron plate 723 is adhered and adsorbed to the magnet 722. The reset spring 724 is fixedly arranged between the transmission rod 523 and the vehicle carrier plate 4, and is used to drive the transmission rod 523 to slide in the direction close to the first gear 521.

[0059] Reference Figure 3 and Figure 5 A plurality of guide wheels 725 are arranged around the pull rope 721, and the guide wheels 725 are rotatably connected to the vehicle carrying plate 4. The plurality of guide wheels 725 guide the pull rope 721 to pull the fixed tooth 532 in a direction in which the fixed tooth 532 escapes from the serrated groove of the serrated bar 531, and the plurality of guide wheels 725 guide the magnetic block 722 to pull the pull rope 721 in a vertically upward direction.

[0060] During use, when the truck is fully loaded, the hydraulic signal output by the liquid pressure sensor 712 is not less than the first set value, and the controller 713 controls the positioning cylinder 513 to retract, so that the truck can crush the first positioning plate 511 and drive out of the loading plate 4; when the truck drives out of the loading plate 4, the hydraulic signal output by the liquid pressure sensor 712 is not greater than the second set value, and the controller 713 controls the positioning cylinder 513 to extend, and controls all the reset cylinders 711 to retract.

[0061] The movable end of the positioning cylinder 513 pulls the pull rope 721 to move through the magnetic attraction of the iron plate 723 and the magnetic block 722, and the pull rope 721 pulls the fixed tooth 532 out of the serrated groove of the serrated bar 531. The transmission rod 523 slides toward the direction close to the first gear 521 under the elastic force of the reset spring 724, so that the first positioning plate 511 and the second positioning plate 512 are reset.

[0062] After the reset cylinder 711 contracts, the moving block 612 slides out of the moving slot 6131 and the limiting block 614 slides out of the serrated limiting slot 6161. The coil spring 621 drives the pull rope 721 to reel in through elastic force. The pull rope 721 pulls the support plate 8 and the loading plate 4 to move back quickly, so that the loading plate 4 can move back quickly to carry the next truck.

[0063] The support plate 8 and the vehicle loading plate 4 move back quickly under the pulling force of the pull rope 721 until the second positioning plate 512 hits the buffer block 714, and the buffer block 714 slides into the buffer groove 31, and the buffer spring 715 accumulates elastic force, and the displacement signal output by the displacement sensor 716 changes. The controller 713 controls all the reset cylinders 711 to extend according to the displacement signal, so that the vehicle moving block 612 is re-engaged in the vehicle moving groove 6131, and the limit block 614 is re-engaged in the serrated limit groove 6161, and the buffer block 714 slides to the bottom of the second positioning plate 512 under the elastic force of the buffer spring 715 to provide support for the second positioning plate 512.

[0064] Reference Figure 2 and Figure 8 The middle part of the movable shaft 81 is bent with a crankshaft portion 811, and the crankshaft portion 811 is rectangular. The movable assembly 6 also includes a damping portion 63. A plurality of damping portions 63 are provided, and they correspond one to one with the movable shaft 81. The damping portion 63 includes a damper 631, a slider 632, an extrusion rod 633 and an extrusion plate 634. One end of the damper 631 is rotatably connected to the crankshaft portion 811, and the other end is hinged to the slider 632. The slider 632 is in a rectangular block shape and is slidably arranged in a sliding hole 83 opened on the support plate 8. The sliding hole 83 is rectangular and runs through the thickness of the support plate 8. The sliding direction of the slider 632 is perpendicular to the axial direction of the movable shaft 81.

[0065] Reference Figure 2 The extrusion rod 633 and the extrusion plate 634 are both located between the vehicle carrier plate 4 and the support plate 8. The extrusion rod 633 is in the shape of a rectangular rod and is vertically arranged. The top of the extrusion rod 633 is fixedly connected to the bottom surface of the vehicle carrier plate 4. The extrusion plate 634 is in the shape of a rectangular plate and is horizontally arranged. The top surface of the extrusion plate 634 is fixedly connected to the bottom end of the extrusion rod 633. When the reset cylinder 711 contracts, the extrusion plate 634 is squeezed on the slider 632.

[0066] During use, when the support plate 8 moves back, the reset cylinder 711 drives the vehicle loading plate 4 to descend, and the vehicle loading plate 4 squeezes the squeezing plate 634 onto the slider 632 through the squeezing rod 633, so that the slider 632 is fixed relative to the support plate 8, and the movable shaft 81 rotates, and the damper 631 is cyclically pulled through the crankshaft part 811. The damper 631 buffers the return impact of the support plate 8 and the vehicle loading plate 4, so that the vehicle loading plate 4, the second positioning plate 512 and the support box 3 are not easily damaged by collision.

[0067] The implementation principle of an automatic grain loading system in an embodiment of the present application is as follows: when in use, a truck drives onto the loading plate 4, and the front wheels of the truck roll over the first positioning plate 511, so that the first positioning plate 511 abuts against the movable end of the positioning cylinder 513, and the first positioning plate 511 drives the second positioning plate 512 to rotate, and the second positioning plate 512 positions the rear wheels of the truck, so that the starting position of the truck relative to the hopper can be accurately positioned.

[0068] The moving cylinder 611 is extended, and the moving cylinder 611 drives the vehicle loading plate 4 to move a certain distance with the clamping force between the moving block 612 and the moving clamping slot 6131 as the supporting force, so that the truck can move accurately relative to the hopper at a certain distance, thereby improving the accuracy of positioning the truck and the hopper.

[0069] The controller 713 controls the first positioning plate 511, the second positioning plate 512 and the vehicle loading plate 4 to automatically reset according to the hydraulic signal output by the liquid pressure sensor 712 and the displacement signal output by the displacement sensor 716, thereby improving the automation level of the vehicle loading system.

[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic grain loading system, characterized in that: It comprises a loading system body (1) and a loading positioning mechanism (2), wherein the loading system body (1) is provided with a loading channel (11), and the loading positioning mechanism (2) comprises a supporting box (3), a loading plate (4), a positioning component (5) and a moving component (6); The positioning assembly (5) comprises a positioning portion (51), a transmission portion (52) and a fixing portion (53); the positioning portion (51) comprises a first positioning plate (511), a second positioning plate (512) and a positioning oil cylinder (513); the transmission portion (52) comprises a first gear (521), a second gear (522), a transmission rod (523), a first rack (524) and a second rack (525); The moving assembly (6) comprises a vehicle moving part (61) and a plate moving part (62); The support box (3) is embedded in the bottom end of the loading channel (11), and the loading plate (4) is arranged at the box opening position at the top end of the support box (3) and is slidably connected to the support box (3); The first positioning plate (511) and the second positioning plate (512) are respectively hinged to the front end and the rear end of the vehicle loading plate (4) through hinge shafts, and the positioning cylinder (513) is located at the front end of the vehicle loading plate (4) and is connected to the vehicle loading plate (4); The first gear (521) is located at one end of the first positioning plate (511) and is fixedly connected to the first positioning plate (511) through a hinge shaft. The second gear (522) is located at one end of the second positioning plate (512) close to the first gear (521). The second gear (522) is fixedly connected to the second positioning plate (512) through a hinge shaft. The transmission rod (523) is slidably connected to one side of the vehicle carrier plate (4) close to the first gear (521). The first rack (524) is fixedly connected to one end of the transmission rod (523) close to the first gear (521). The first rack (524) is meshed with the first gear (521). The second rack (525) is fixedly connected to one end of the transmission rod (523) close to the second gear (522). The second rack (525) is meshed with the second gear (522). The clamping portion (53) is arranged between the vehicle loading plate (4) and the transmission rod (523), and is used to limit the transmission rod (523) from sliding in a direction close to the first gear (521); The vehicle moving part (61) and the plate moving part (62) are both arranged between the vehicle carrying plate (4) and the support box (3); the vehicle moving part (61) is used to drive the vehicle carrying plate (4) to move forward relative to the support box (3) at a fixed distance, and the plate moving part (62) is used to continuously and quickly drive the vehicle carrying plate (4) to move backward relative to the support box (3); In the initial state, the first positioning plate (511) is perpendicular to the vehicle loading plate (4), the second positioning plate (512) is parallel to the vehicle loading plate (4), the positioning cylinder (513) is in an extended state, and the first positioning plate (511) can abut against the movable end of the positioning cylinder (513) after rotation.

2. The automatic grain loading system according to claim 1, characterized in that: The clamping portion (53) comprises a sawtooth bar (531), a clamping tooth (532) and a clamping spring (533); the sawtooth bar (531) is fixedly arranged at the middle part of the transmission rod (523); the vertical side of the sawtooth groove on the sawtooth bar (531) is arranged close to the second gear (522); the clamping tooth (532) is slidably connected to the vehicle loading plate (4); the clamping spring (533) is arranged between the clamping tooth (532) and the vehicle loading plate (4) and is used to drive the end of the clamping tooth (532) to clamp into one of the sawtooth grooves of the sawtooth bar (531).

3. The automatic grain loading system according to claim 2 is characterized in that: The vehicle moving unit (61) comprises: At least two vehicle moving cylinders (611) are provided and are symmetrically arranged on both sides of the vehicle carrying plate (4) in the sliding direction. The vehicle moving cylinders (611) are hinged to the vehicle carrying plate (4); At least two car moving blocks (612) are provided and are hinged to the movable ends of the car moving cylinder (611) in a one-to-one correspondence; Two first car moving bars (613) are provided and are respectively fixed on two sides of the support box (3) close to the car loading plate (4); a plurality of car moving slots (6131) are provided on the first car moving bars (613), and the plurality of car moving slots (6131) are evenly arranged along the sliding direction of the car loading plate (4); The car moving block (612) is used to be clamped in the car moving slot (6131) to provide a supporting force to the car moving cylinder (611); a first return torsion spring (6111) is provided at the hinge between the car moving cylinder (611) and the vehicle loading plate (4); the first return torsion spring (6111) is used to drive the car moving cylinder (611) to rotate in a direction close to the side wall of the support box (3); a second return torsion spring (6112) is provided at the hinge between the movable end of the car moving cylinder (611) and the car moving block (612); the second return torsion spring (6112) is used to drive the car moving block (612) to rotate in a direction close to the side wall of the support box (3).

4. The automatic grain loading system according to claim 3 is characterized in that: The plate moving part (62) comprises a coil spring (621) and a steel wire rope (622); the coil spring (621) is arranged at one end of the support box (3) close to the rear end of the vehicle loading plate (4); one end of the steel wire rope (622) is connected to the coil spring (621) and the other end is connected to the vehicle loading plate (4); the steel wire rope (622) is wound around the coil spring (621); and the coil spring (621) is used to drive the steel wire rope (622) to reel up.

5. The automatic grain loading system according to claim 4 is characterized in that: The vehicle moving part (61) further comprises a limit block (614), a limit spring (615) and a second vehicle moving strip (616); the limit block (614) is slidably arranged in a slide groove (41) provided on one side of the vehicle loading plate (4) in the sliding direction; the limit spring (615) is arranged between the limit block (614) and the bottom of the slide groove (41); the second vehicle moving strip (616) is fixedly arranged on one side of the support box (3) close to the limit block (614); the second vehicle moving strip (616) is evenly provided with a plurality of sawtooth limit grooves (6161) along the sliding direction of the vehicle loading plate (4); the vertical side of the sawtooth limit groove (6161) is arranged close to the coil spring (621); the limit spring (615) is used to drive the end of the limit block (614) to be clamped in the sawtooth limit groove (6161).

6. The automatic grain loading system according to claim 5, characterized in that: The loading positioning mechanism (2) further comprises a reset assembly (7), the reset assembly (7) comprising a first reset portion (71) and a second reset portion (72), the first reset portion (71) being used to control the extension and retraction of the positioning cylinder (513) and the lifting and lowering of the loading plate (4) based on the weight of the loading plate (4), and the second reset portion (72) being used to control the reset of the first positioning plate (511) and the second positioning plate (512).

7. The automatic grain loading system according to claim 6, characterized in that: A support plate (8) is provided on one side of the vehicle loading plate (4) close to the bottom of the support box (3); the support plate (8) is slidably connected to the support box (3) and is fixedly connected to one end of the steel wire rope (622) away from the coil spring (621); and the first reset part (71) comprises a reset oil cylinder (711), a liquid pressure sensor (712) and a controller (713); A plurality of reset oil cylinders (711) are provided, and all are located between the vehicle-carrying plate (4) and the support plate (8); the reset oil cylinder (711) is fixedly connected to the support plate (8); and the movable end of the reset oil cylinder (711) is fixedly connected to the vehicle-carrying plate (4); a liquid pressure sensor (712) is fixedly arranged in a rodless cavity of one of the reset oil cylinders (711) and is used to output a hydraulic signal; a controller (713) is electrically connected to the liquid pressure sensor (712), all the reset oil cylinders (711) and the positioning oil cylinder (513), respectively; the controller (713) responds to the hydraulic signal output by the liquid pressure sensor (712) and is used to control the extension and contraction of the positioning oil cylinder (513) and the contraction of all the reset oil cylinders (711); When the hydraulic signal is not less than a first set value, the controller (713) controls the positioning cylinder (513) to contract; When the hydraulic signal is not greater than the second set value, the controller (713) controls the positioning cylinder (513) to extend, and controls all the reset cylinders (711) to retract.

8. The automatic grain loading system according to claim 7, characterized in that: The first reset portion (71) further comprises a buffer block (714), a buffer spring (715) and a displacement sensor (716); the buffer block (714) is located at one end of the support box (3) close to the rear end of the vehicle loading plate (4); the buffer block (714) is slidably arranged in a buffer groove (31) provided at the top of the support box (3); the buffer spring (715) is arranged between the buffer block (714) and the bottom of the buffer groove (31), and is used to drive the buffer block (714) to slide into the support box (3); the displacement sensor (716) is embedded in the bottom of the buffer groove (31), and is used to output a displacement signal between the buffer block (714) and the bottom of the buffer groove (31); the displacement sensor (716) is electrically connected to the controller (713); the controller (713) responds to the displacement signal output by the displacement sensor (716), and is used to control all reset cylinders (711) to extend.

9. The automatic grain loading system according to claim 7, characterized in that: The second reset portion (72) comprises: A pull rope (721), one end of which is fixedly connected to the fixing tooth (532); The magnetic block (722) is slidably connected to the vehicle carrier plate (4) and is disposed close to the positioning oil cylinder (513). The other end of the pull rope (721) is fixedly connected to the magnetic block (722); The iron plate (723) is fixed on the movable end of the positioning cylinder (513). When the movable end of the positioning cylinder (513) is contracted, the iron plate (723) and the magnetic block (722) are attached and adsorbed. A return spring (724) is arranged between the transmission rod (523) and the vehicle-carrying plate (4) and is used to drive the transmission rod (523) to slide in a direction close to the first gear (521); A plurality of guide wheels (725) are arranged around the pull rope (721), the guide wheels (725) are rotatably connected to the vehicle loading plate (4), and the plurality of guide wheels (725) guide the pull rope (721) to pull the fixing teeth (532) in a direction that is the direction in which the fixing teeth (532) escape from the sawtooth groove of the sawtooth bar (531).

10. The automatic grain loading system according to claim 7, characterized in that: The side of the support plate (8) away from the vehicle-carrying plate (4) is connected to a moving wheel (82) via a moving shaft (81); the moving shaft (81) is fixedly connected to the moving wheel (82) and is rotatably connected to the support plate (8); a crankshaft portion (811) is bent on the moving shaft (81); and the moving wheel (82) abuts against the bottom end of the support box (3); The moving assembly (6) further comprises a damping part (63), wherein the damping part (63) comprises a damper (631), a slider (632), an extrusion rod (633) and an extrusion plate (634); One end of the damper (631) is rotatably connected to the crankshaft (811), and the other end is hinged to the slider (632), and the slider (632) is slidably arranged in a sliding hole (83) opened on the support plate (8); The extrusion rod (633) and the extrusion plate (634) are both located between the vehicle-carrying plate (4) and the support plate (8); the extrusion rod (633) is fixedly connected to the vehicle-carrying plate (4); the extrusion plate (634) is fixedly connected to the extrusion rod (633); when the resetting oil cylinder (711) contracts, the extrusion plate (634) is pressed onto the slider (632).

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